How U.S. Airports Are Regulated

For anyone acquiring, building, or operating a U.S. airport, regulations span federal, state, and local levels. No single agency governs airports; instead, 10+ federal agencies (see table below), plus state/local—each with distinct jurisdiction, enforcement mechanisms, and compliance timelines—shape every aspect of airport operations, from the height of a fence post to the price of a landing fee.

This article explains the Constitutional foundation that makes federal aviation regulation possible, walks through the federal agencies with authority over airports, identifies the state and local regulatory layers that apply, and details the financial regulatory framework governing airport revenues, expenditures, and borrowing. This article targets airport owners, operators, and advisors operating within the regulatory framework.

Part I: The Constitutional Foundation

Understanding why the federal government has the power to regulate airports and where that power ends provides context for the regulatory framework. Five provisions of the U.S. Constitution create the legal architecture for airport regulation.

1.1 The Commerce Clause

Article I, Section 8, Clause 3 of the Constitution gives Congress the power "to regulate Commerce with foreign Nations, and among the several States." Because 99%+ of commercial aviation crosses state lines (FAA CY2023 enplanement data), Congress has exercised exclusive authority per Supreme Court precedents (e.g., Gibbons v. Ogden) over air commerce since the Air Commerce Act of 1926.

The Supreme Court established the breadth of this power in Gibbons v. Ogden (1824), holding that Congress’s commerce power extends to all activities that cross state lines or materially affect interstate commerce. In Cooley v. Board of Wardens (1852), the Court established a framework for dual sovereignty: states may regulate matters of local concern when Congress is silent, but where a subject requires national uniformity—as aviation does—federal law governs exclusively.

Congress has used this authority to enact the entire Federal Aviation Act (49 U.S.C. § 40101 et seq.), the Airline Deregulation Act of 1978, and the Aviation and Transportation Security Act. These statutes uniformly regulate aircraft design, pilot certification, air traffic control, airport safety, and airline commerce across all fifty states.

1.2 The Supremacy Clause and Federal Preemption

Article VI, Clause 2 declares that federal law is "the supreme Law of the Land." When Congress acts within its constitutional authority, valid federal law supersedes conflicting state or local law.

For airports, the Supremacy Clause is the Airline Deregulation Act’s preemption provision (49 U.S.C. § 41713), which prohibits states and localities from enacting or enforcing any law "related to a price, route, or service of an air carrier." In Morales v. Trans World Airlines (1992), the Supreme Court interpreted this provision broadly, as held in Morales v. Trans World Airlines (1992): a state regulation is preempted if it has even a "connection with or reference to" airline rates, routes, or services.

In practice, airport owners cannot use local ordinances, consumer protection statutes, or indirect regulatory mechanisms to control what airlines charge, where they fly, or what service they provide. Federal law preempts per 49 U.S.C. § 41713 and Morales (1992) state regulation of airline prices, routes, and services, though courts have recognized limited state roles in areas such as contract enforcement and certain tort claims.

1.3 The Proprietor Exception

The same statute that preempts state regulation carves out an exception: it "does not limit a State, political subdivision of a State, or political authority … that owns or operates an airport … from carrying out its proprietary powers and rights" (49 U.S.C. § 41713).

In City of Burbank v. Lockheed Air Terminal (1973), the Supreme Court struck down a municipal ordinance imposing a nighttime jet curfew, holding that federal law completely preempts local authority over aircraft operations and noise. The Court reasoned that allowing local curfews would disrupt national air traffic management.

What proprietor rights actually include: establishing noise compatibility programs under FAA Part 150, designating runway use, setting ground-level operational procedures, controlling ground-level noise from engines on the ramp, setting rates consistent with Grant Assurances 22-24 (FAA Order 5190.6C), and regulating non-air-carrier tenants.

What proprietor rights do not include: imposing unilateral curfews on flight operations (though ANCA-compliant restrictions with FAA approval may be permissible), limiting flight frequency, denying landing rights based on noise or environmental concerns, controlling flight paths in navigable airspace, or regulating airline routes, fares, or service levels.

1.4 The Spending Clause and Grant Assurances

Article I, Section 8, Clause 1 gives Congress the power to spend for the "general Welfare." Congress uses this power to attach conditions to federal airport grants—conditions that function as regulation without technically being regulation.

Under 49 U.S.C. § 47107, every airport that accepts Airport Improvement Program (AIP) grants may execute 39 written assurances covering public access, nondiscrimination, fee structures, revenue use, noise compatibility, and more. The Supreme Court upheld this conditional spending model in South Dakota v. Dole (1987). The grant assurance system is a primary regulatory mechanism over airports, reaching conduct that Congress might otherwise lack direct Commerce Clause authority to regulate.

1.5 Federal Sovereignty Over Navigable Airspace

49 U.S.C. § 40103 declares that "the United States Government has exclusive sovereignty of airspace of the United States" and that "a citizen of the United States has a public right of transit through the navigable airspace."

The Supreme Court confirmed in United States v. Causby (1946) that the ancient common-law doctrine of ad coelum—that landowners own everything up to the heavens—has no place in the modern world. Navigable airspace is federal public domain. Airport owners do not own the airspace above their airports. The FAA controls all flight paths, approach procedures, and airspace designations. Airports cannot refuse overflights or dictate how aircraft reach their runways.

1.6 Takings, Noise Liability, and the Airport Owner's Dilemma

The Fifth Amendment prohibits taking private property "for public use, without just compensation." In Griggs v. Allegheny County (1962), the Supreme Court held that an airport owner is liable when aircraft operations create noise severe enough to constitute a taking of neighboring property.

Part II: The Federal Regulatory Architecture

The table below lists 10 federal agencies (FAA summary) with regulatory authority over U.S. airports. The FAA is the primary federal regulator, but it is one of several agencies with jurisdiction. Knowing which agency governs what—and where jurisdictions overlap—is necessary for compliance planning.

2.1 Federal Aviation Administration (FAA)

The FAA is the primary federal regulator of airports and aviation safety. Its authority spans multiple areas, including:

Airport Certification (14 CFR Part 139)

Any airport serving scheduled passenger-carrying operations in aircraft designed for more than 9 passenger seats, subject to FAA classification and exemptions (Classes I–IV) may hold an FAA Airport Operating Certificate under Part 139. The FAA classifies certificated airports into four classes based on operations served: Class I airports serve all types of scheduled air carrier operations; Class IV airports serve only unscheduled operations of large air carrier aircraft.

Certification requires an Airport Certification Manual (ACM) detailing operating procedures, Aircraft Rescue and Fire Fighting (ARFF) capabilities, maintenance schedules, and personnel qualifications. ARFF requirements are organized into five Index levels (A through E) specifying required vehicles, foam capacity, and a mandatory three-minute response time for the first responding vehicle to reach the midpoint of the farthest runway. The FAA conducts no fewer than 12-month certification inspections (14 CFR § 139.341) and random unannounced inspections, including timed ARFF response drills.

Part 139 also mandates Wildlife Hazard Management (14 CFR § 139.337): certificated airports may conduct wildlife hazard assessments whenever a wildlife strike presents a hazard, and develop Wildlife Hazard Management Plans addressing species of concern, habitat modification, and population management. Additionally, every Part 139 airport may maintain an Airport Emergency Plan (14 CFR § 139.325) coordinated with local fire, law enforcement, and emergency medical services—addressing aircraft incidents, bomb threats, structural fires, natural disasters, and hazardous materials events. These plans may be tested through triennial full-scale exercises.

Airspace Protection (14 CFR Part 77)

Part 77 establishes standards for determining obstructions to navigable airspace. It defines imaginary surfaces (primary, approach, transitional, horizontal, and conical) around airports that limit construction height. Any proposed structure exceeding specified height thresholds requires filing FAA Form 7460-1 (Notice of Proposed Construction) at least 45 days before construction begins.

Airport Compliance System

The FAA's Airport Compliance Program, governed by FAA Order 5190.6C, ensures airports meet their federal obligations—particularly the 40 Grant Assurances. The system handles complaints (from airlines, tenants, or the public), conducts investigations, issues compliance determinations, and enforces corrective actions. Remedies range from informal resolution to withholding federal funding, civil penalties, and certificate revocation.

Airport Improvement Program (49 U.S.C. § 47101 et seq.)

The AIP is the primary federal grant program for airport capital projects, funded through the Airport and Airway Trust Fund. Grants are distributed as formula-based entitlements and competitive discretionary awards, with e.g., 80/20 entitlement/discretionary split in FY2024 per FAA AIP fact sheet. The federal cost share varies by hub size: 75% for large and medium hub airports (requiring a 25% local match), and 90% for small hub, reliever, and general aviation airports (10% local match). The 2024 FAA Reauthorization Act temporarily increased the federal share to 95% for nonhub and nonprimary airports for FY 2025–2026. Eligible projects include runways, taxiways, safety improvements, noise mitigation, and certain terminal improvements. Accepting AIP funding triggers all 40 Grant Assurances.

Passenger Facility Charges (49 U.S.C. § 40117)

PFCs are federally authorized charges of up to $4.50 per enplaning passenger, collected by airlines on behalf of airports. PFC-eligible projects are broader than AIP: they can fund terminal construction, gates, parking, and even debt service on eligible projects. PFC authority imposes parallel statutory obligations under 49 U.S.C. § 40117 that largely mirror those assurances. The maximum PFC on a one-way trip is two charges ($9.00); on a round trip, four charges ($18.00). Statutory exemptions apply to interisland flights in Hawaii and certain segments in Alaska (49 U.S.C. § 40117(e)(2)). Airports at $3.00 or below see their AIP entitlements reduced by 50%; above $3.00, by 60% (reduced from 75% by the 2024 FAA Reauthorization Act).

National Plan of Integrated Airport Systems (NPIAS)

The NPIAS identifies approximately 3,300 airports meeting specific national air transportation system criteria. Only NPIAS-listed airports are eligible for AIP grants. The FAA updates the NPIAS every two years and classifies airports by hub size: large hub (1% or more of U.S. enplanements, 31 airports), medium hub (0.25–0.99%, 32 airports), based on FAA CY 2024 enplanement data, small hub, nonhub commercial, nonprimary, general aviation, and reliever.

2.2 Transportation Security Administration (TSA)

Under 49 CFR Part 1542 (within the broader Parts 1540–1562 framework), the TSA requires every airport serving air carrier operations to maintain an Airport Security Program. Airports may designate and control multiple security zones: Secured Areas, Air Operations Areas (AOA), Security Identification Display Areas (SIDA), and Sterile Areas. Each airport may appoint an Airport Security Coordinator. TSA conducts inspections and can issue Security Directives requiring immediate compliance. Non-compliance can result in civil penalties and operational restrictions.

2.3 U.S. Customs and Border Protection (CBP)

Any airport handling international flights may provide Federal Inspection Services (FIS) facilities meeting CBP standards. Airports that lack sufficient international traffic volume for unreimbursed CBP services may apply for User Fee Airport designation, under which the airport sponsor covers all CBP staffing costs, facility construction and maintenance, and IT infrastructure. A Memorandum of Agreement with the local CBP Port Director governs the relationship.

2.4 Environmental Protection Agency (EPA)

The EPA's authority over airports spans five statutes:

• NEPA (42 U.S.C. § 4321 et seq.): Any airport project requiring FAA approval or federal funding may undergo environmental review—either a categorical exclusion, an Environmental Assessment, or a full Environmental Impact Statement. The FAA serves as the lead federal agency for airport NEPA reviews, administered under Council on Environmental Quality (CEQ) regulations. EPA reviews and comments on Environmental Impact Statements under Section 309 of the Clean Air Act.
• Clean Air Act (42 U.S.C. § 7401 et seq.): Airport expansions in nonattainment areas may require air quality conformity demonstrations.
• Clean Water Act (33 U.S.C. § 1344): Stormwater discharges require NPDES permits; wetlands fill requires Section 404 permits from the Army Corps of Engineers.
• RCRA (42 U.S.C. § 6901 et seq.): Airports storing hazardous waste (fuel, solvents, deicing chemicals) may comply with storage, labeling, and disposal requirements.
• PFAS/CERCLA: Aqueous Film-Forming Foam (AFFF) used for aircraft firefighting contains PFAS compounds now designated as CERCLA hazardous substances. CERCLA imposes strict liability (42 U.S.C. § 9607) on airports with historical AFFF use for groundwater contamination; defenses available per case law (e.g., arranged-for vs. passive migration). The FAA's F3 Transition Plan charts a path toward fluorine-free alternatives, and the 2024 FAA Reauthorization Act (Section 767) created a grant reimbursement program for airports that voluntarily adopt fluorine-free foam. This represents an emerging liability under CERCLA, as evidenced by recent EPA enforcement actions (EPA, 2024) for airport owners with historical AFFF use.

2.5 Department of Transportation (DOT)

Beyond the FAA and TSA, DOT plays several distinct roles. DOT, through the FAA's Office of Airport Compliance and the Part 16/§ 47129 dispute process, adjudicates airline rate disputes under the Rates and Charges Policy. The DOT Office of Inspector General audits airport revenue use for grant assurance compliance. DOT administers the Essential Air Service (EAS) program ensuring airline service to underserved communities. And DOT negotiates bilateral air service agreements governing international routes.

2.6 Other Federal Agencies

• OSHA (29 CFR § 1910): Workplace safety at airports, including confined space programs for fuel tanks and utility vaults, hazard communication for deicers and solvents, and fall protection.
• FCC (47 CFR Part 87): Aviation communications frequencies, radar interference protection, and radionavigation services.
• Army Corps of Engineers: Section 404 wetlands permits for airport development involving fill in waters of the United States.
• DHS/FEMA (44 CFR Part 201): Emergency operations planning, hazard mitigation, and continuity of operations for airports in high-risk areas.
• ICE: Immigration enforcement at airports with international operations.
• NTSB: Investigates aircraft accidents and incidents at or near airports; airports may preserve wreckage sites and cooperate with investigations under 49 CFR Part 830.

Federal Regulatory Jurisdiction Summary

Agency	Primary Authority	Key Obligation
FAA	14 CFR Part 139; 49 USC § 47101+	Certification, AIP, PFC, compliance
TSA	49 CFR Parts 1540–1562	Security program, access control
CBP	MOA / User Fee Program	FIS facilities, staffing costs
EPA	NEPA, CAA, CWA, RCRA, CERCLA	Environmental review, permits, PFAS
DOT/OST	49 USC § 47129	Rates & charges, revenue diversion
OSHA	29 CFR § 1910	Worker safety, confined spaces
FCC	47 CFR Part 87	Communications, radar protection
Army Corps	33 USC § 1344 (CWA §404)	Wetlands permits
DHS/FEMA	44 CFR Part 201	Emergency planning, mitigation
NTSB	49 CFR Part 830	Accident investigation, wreckage preservation

Part III: State and Local Regulatory Layers

Federal law dominates aviation regulation, but states and localities retain important authority—particularly over airport governance, environmental review, labor standards, and land use.

3.1 State Aeronautics Authorities

Every state maintains an aeronautics department or commission responsible for non-Part 139 airports (general aviation, private, heliports). For FAA-certificated airports, the state role is secondary—the FAA conducts all safety oversight. But state aeronautics agencies may still may require airport registration, enforce state safety standards, coordinate with NTSB on accident investigations, and administer state aviation grant programs.

3.2 State Environmental Review

Several states impose environmental review requirements more stringent than federal NEPA. California's CEQA (California Environmental Quality Act) requires mitigation of environmental impacts, not merely disclosure—a higher standard than NEPA. New York's SEQR (State Environmental Quality Review) imposes a similar assessment process. Airport projects in these states face dual environmental review: federal NEPA plus state CEQA or SEQR, each with its own timeline, public comment requirements, and litigation risk.

3.3 State Labor and Tax Law

State prevailing wage laws may apply to airport construction projects, particularly those involving state grants or public procurement. Workers' compensation requirements apply to all airport employees. Property tax treatment varies by state—most states exempt publicly owned airports, but conditions may apply. State sales tax exemptions for aviation fuel and aircraft parts are common but not universal.

3.4 Local Zoning and Land Use

Local governments play an important role in protecting airports from incompatible development. FAA Advisory Circular 150/5190-4B, Airport Land Use Compatibility Planning, provides guidance on land use compatibility around airports, covering height restrictions, noise, wildlife attractants, and protection of persons and property. Local zoning boards enforce height limits, restrict noise-sensitive uses (schools, hospitals, residential) near airports, and may require sound insulation in -noise zones. Building codes govern terminal construction standards, including fire ratings, emergency egress, and structural loads for aircraft vibration.

3.5 Local Noise Ordinances

Local noise ordinances present a delicate jurisdictional question. Ordinances that restrict aircraft operations (curfews, flight frequency limits, aircraft type restrictions) are preempted by federal law. But ordinances addressing ground-based noise (ground support equipment, engine run-ups during maintenance) remain within local authority. Airport proprietors may pursue voluntary noise compatibility programs under FAA Part 150, which provide a federally endorsed framework for noise mitigation without running afoul of preemption.

The Airport Noise and Capacity Act of 1990 (ANCA) and its implementing regulation, 14 CFR Part 161, establish the federal framework for airport noise restrictions on Stage 3 aircraft. Any airport seeking to impose new noise or access restrictions may complete a Part 161 study and receive FAA approval. No new post-ANCA approvals for restrictions under Part 161 have been granted (FAA docket).

Part IV: Airport Governance Models

How an airport is governed shapes its regulatory obligations, financial flexibility, and operational autonomy. There are three primary governance models in the United States.

City or County Department

31% of 3,300 NPIAS airports operate as departments of a city or county government per ACRP Report 82 (2015, latest comprehensive). The airport director reports to the city manager or county administrator. The city council or county board approves the budget, sets rates, and authorizes capital projects. This model subjects the airport to municipal political oversight and appropriations cycles, which can constrain decision-making speed. Revenue use in this model requires segregation from general fund to align with 49 U.S.C. § 47107(b) (FAA Order 5190.6C).

Independent Airport Authority

435 airports are governed by quasi-governmental special district authorities with appointed boards. The 2022 Census of Governments identified 435 independent special districts operating as airport authorities nationwide. The authority has sole jurisdiction over airport operations, finance, and capital planning, separate from city or county government. This model provides greater operational autonomy and insulation from local political cycles. Multi-jurisdictional authorities (like the Port Authority of New York and New Jersey) can manage airports serving multiple states.

Airport District

A small number of airports (e.g., 12 in Midwest states per AOPA Airport Directory 2024) are governed by elected airport districts. Board members face direct electoral accountability, which influences capital investment decisions and rate-setting.

Airport Investment Partnership Program

Under 49 U.S.C. § 47134, Congress established what is now the Airport Investment Partnership Program (AIPP, formerly the Airport Privatization Pilot Program). The 2018 FAA Reauthorization Act removed numerical limits on participation and renamed the program. Private operators may maintain compliance with grant assurances, keep rates reasonable, and receive airline approval. While 6 total participants (FAA AIPP, as of 2024)—with mixed results—the program represents an alternative governance model that new airport owners can understand, particularly as infrastructure funding gaps pressure public sponsors to explore private capital partnerships.

Part V: The Financial Regulatory Framework

Airport finance is not free-market capitalism. How airports earn, spend, and borrow is subject to regulatory constraints at multiple levels — constraints worth understanding for financial planning.

5.1 Rates and Charges Regulation

Under 49 U.S.C. § 47129, the DOT has authority to resolve disputes concerning airport fees. The DOT Policy Regarding Airport Rates and Charges (originally 1996, amended 2008, consolidated 2013) establishes that rates charged to aeronautical users may be "fair and reasonable" under two overlapping tests.

• Cost-based test: Rates may be based on recovery of appropriate airport costs. For airfield use, the default methodology is historic cost accounting (HCA) unless the airport and airlines agree otherwise.
• Comparability test: Rates charged to similarly situated users may not be unjustly discriminatory. An airport cannot charge one airline more than a comparable airline for the same facility.

Airlines may challenge airport rates by requesting a DOT determination. The DOT evaluates whether charges are reasonable under these standards. Federal law does not mandate a single rate-setting methodology—airports may use residual, compensatory, or hybrid approaches—but whichever method is chosen may produce rates that pass both tests.

5.2 Revenue Use and the Diversion Prohibition

Two statutes create an ironclad rule: all airport revenue may be used for airport purposes.

• 49 U.S.C. § 47107(b): Requires written assurances that airport revenues will be expended for capital or operating costs of the airport, the local airport system, or other local facilities directly and materially related to air transportation.
• 49 U.S.C. § 47133: Extends the revenue-use restriction to all airports receiving federal assistance, with no expiration—the restriction persists "so long as the airport is used as an airport."

Prohibited diversions include payments to the city general fund, excessive tax-equivalency payments, and subsidies to non-airport services. Permissible uses include capital improvements, operating expenses, debt service, and documented administrative overhead. The FAA enforces these rules through funding withholding and civil penalties, and the DOT Inspector General conducts audits of airports.

5.3 Federal Funding Mechanisms

Airport and Airway Trust Fund

The Trust Fund (26 U.S.C. § 9502), established in 1970, collects aviation excise taxes: 7.5% on domestic airline tickets, 6.25% on domestic air freight, and fuel taxes on general aviation. It funds FAA operations, air traffic control modernization, and AIP grants. The AATF had a projected cash balance of $18.8 billion at the end of FY 2025 (FAA).

Infrastructure Investment and Jobs Act (IIJA/BIL)

Enacted November 2021, the Bipartisan Infrastructure Law provided approximately $25 billion in total for aviation infrastructure, of which approximately $19.6 billion is available to airport sponsors across three programs: Airport Infrastructure Grants (AIG, $14.5 billion in formula grants following AIP criteria), the Airport Terminal Program (ATP, approximately $5 billion in competitive terminal grants with an 80% federal share for large and medium hubs and 95% for smaller airports), and the Federal Contract Tower program ($100 million). The remaining approximately $5 billion funds FAA Facilities and Equipment (air traffic control systems and FAA buildings), which is not available to airport sponsors. These are time-limited supplemental appropriations distributed through FY 2026.

FAA Reauthorization Act of 2024

The FAA Reauthorization Act of 2024 extended and updated the AIP and PFC programs. AIP authorization was raised from $3.35 billion to $4.0 billion per year for FY 2025–2028—a 19% increase. The Bipartisan Infrastructure Law amended TIFIA (Transportation Infrastructure Finance and Innovation Act) authority to permanently include airport projects under 23 U.S.C. § 602(a)(4). This permanent authorization ensures airport eligibility for TIFIA low-interest federal credit programs on an ongoing basis, though appropriations for credit subsidy costs may have separate annual or multi-year deadlines. The Act's specific financial and operational impacts are covered in a companion DWU article.

5.4 Municipal Bond Regulation

Most airport capital projects are financed through tax-exempt revenue bonds issued under Section 103 of the Internal Revenue Code. Airport bonds may qualify as exempt facility bonds under IRC § 142(a)(6), which allows airports to issue private activity bonds.

Bond issuers may comply with SEC Rule 15c2-12, which requires continuing disclosure: annual financial information and operating data posted to the MSRB's EMMA portal, plus timely notice (within 10 business days) of material events including payment defaults, ratings changes, and debt service reserve fund changes.

Standard airport bond indentures include a rate covenant (setting rates sufficient to cover debt service and operations), an additional bonds test (no new debt unless projected revenues cover existing plus new debt service by a stated multiple, such as 1.25x per indenture terms), and a debt service reserve fund (maintained at a minimum level, such as one year's maximum annual debt service per indenture requirements).

5.5 Airline Use Agreements

Airline Use Agreements (AUAs) are not federal regulations but contractual governance frameworks that define the financial relationship between airports and airlines. They specify rate-setting methodology, cost allocation, revenue sharing, and capital approval mechanisms.

Under a residual methodology, signatory airlines collectively guarantee to cover all airport costs—the airport has low financial risk but also low reward. Under a compensatory methodology, the airport calculates fair-share charges and retains all non-airline revenue—the airport takes all revenue risk. Hybrid approaches combine elements of both. Many AUAs include Majority-in-Interest (MII) clauses giving airlines accounting for the majority of traffic certain approval rights over capital projects.

5.6 Financial Reporting Requirements

Airport operators may comply with multiple financial reporting regimes simultaneously.

• GASB 34: Airports structured as enterprise funds may report using accrual-basis accounting with infrastructure asset depreciation.
• ACFR: Annual detailed Financial Reports with audited financial statements, management discussion and analysis, and statistical sections.
• Official Statements: Disclosure documents published when issuing revenue bonds, containing financial projections, risk factors, and bond-specific terms.
• FAA Form 5100-127: Annual Operating and Financial Summary filed with the FAA through the Certification Activity Tracking System (CATS), certified by the principal financial officer.
• GASB 87 and 96: Recent standards affecting airport concession lease accounting (GASB 87) and IT subscription arrangements (GASB 96).

5.7 DBE and ACDBE Requirements

Airports receiving federal funding may establish Disadvantaged Business Enterprise (DBE) programs for federally-assisted contracts (49 CFR Part 26) and Airport Concessions DBE (ACDBE) programs for concession contracts (49 CFR Part 23). Goals are set based on availability and disparity studies. Prime contractors and concessionaires may demonstrate good-faith efforts to meet subcontracting goals. Non-compliance can result in sanctions and loss of federal funding eligibility.

Part VI: The 40 Grant Assurances

The grant assurance system is a primary federal tool for regulating airport conduct. When an airport accepts AIP grants, it executes written assurances that bind operations for decades. PFC authority imposes parallel statutory obligations that largely mirror those assurances. Here are the key assurances affecting day-to-day operations:

#	Assurance	What It Requires
5	Preserving Rights and Powers	may maintain authority to comply; cannot sell or lease obligated property without FAA approval
22	Economic Nondiscrimination	Non-discriminatory access and rates for all aeronautical users; cannot favor one carrier over a comparable competitor
23	Exclusive Rights	No monopoly rights to any service provider; airport may self-provide services with own employees
24	Fee and Rental Structure	Rates may be fair and reasonable, and the airport may be as self-sustaining as possible
25	Airport Revenue	All airport revenue used for airport purposes; diversion prohibited; persists as long as airport exists
29	Airport Layout Plan	may maintain an FAA-approved ALP; no development inconsistent with the plan
30	Civil Rights	Comply with Title VI, Section 504, and the Age Discrimination Act
34	Policies, Standards, and Specifications	Federal procurement and audit standards for AIP-funded projects
37	Self-Sustaining Requirement	Set charges to make the airport self-sustaining; not use AIP funds to subsidize airline costs

Part VII: Current Regulatory Issues and Emerging Challenges

7.1 PFAS Contamination Liability

The designation of PFOS and PFOA as CERCLA hazardous substances creates financial liability for airports that used AFFF for firefighting training and emergencies, affecting a large share of Part 139 certificated airports. Groundwater contamination has been documented at numerous airport sites. EPA drinking water standards set maximum contaminant levels at 4 parts per trillion for PFOS/PFOA. Congress directed the FAA to develop a transition plan for fluorine-free foam, and the FAA's F3 Transition Plan charts the timeline—but the transition itself is voluntary, not mandated. The 2024 FAA Reauthorization Act (Section 767) created a grant reimbursement program for airports that adopt fluorine-free foam. Legacy contamination liability remains regardless of transition status. Current and former airport owners and operators may face strict liability exposure for cleanup costs under CERCLA, though cost allocation frameworks and potential defenses (including federal contractor arguments) continue to evolve in litigation.

7.2 PFC Cap Debate

The $4.50 PFC cap has not been adjusted since 2000. Airports argue it has lost purchasing power to inflation and needs to be raised—or at minimum indexed—to fund terminal modernization and capacity expansion. Major airlines, representing 80% of U.S. domestic traffic, have opposed increases in lobbying efforts (Airlines for America filings, 2024). The cap debate has been a recurring topic in historical data from the last three FAA reauthorization cycles (2018, 2024).

7.3 Revenue Diversion Enforcement

DOT Inspector General audits continue to identify revenue diversion at airports where city or county governments transfer airport revenues to general funds. Instances of tension between municipal fiscal pressures and grant assurance compliance have been noted in enforcement actions, particularly at city-department airports where revenue flows through general fund accounting systems, as documented in 15 DOT IG audits since 2020.

7.4 Infrastructure Funding Gap

ACI-NA estimates that U.S. airports need $173.9 billion in infrastructure investment over the next five years (2025 estimate, up from $151 billion in the 2023 report), while the FAA's NPIAS identifies total cost of $78.3 billion for airport development needs (NPIAS 2025–2029), of which approximately $67.5 billion represents the primary, reliever, and general aviation airport subset qualifying for AIP eligibility—both figures exceeding available resources by an estimated $50 billion based on ACI-NA projections (ACI-NA 2025 report). The IIJA/BIL provided a one-time infusion, but structural funding gaps persist. This creates pressure to find new revenue mechanisms, increase PFCs, and attract private capital through public-private partnerships.

7.5 Climate Resilience and Environmental Mandates

Airports are addressing climate resilience through infrastructure hardening (sea-level rise mitigation, extreme weather adaptation) and carbon emissions reduction. Sustainability requirements now appear in federal grant conditions and bond covenants. Rating agencies evaluate climate risk as a material credit factor in airport credit analysis.

Key Regulatory Milestones

The regulatory framework governing U.S. airports evolved over nearly a century of federal legislation, Supreme Court decisions, and agency rulemaking. The following timeline identifies the milestones.

Year	Event	Significance
1926	Air Commerce Act	First federal aviation regulation; Commerce Clause authority established
1938	Civil Aeronautics Act	Created Civil Aeronautics Authority; economic regulation of airlines
1946	Federal Airport Act	First federal airport grant program
1946	United States v. Causby	Supreme Court: navigable airspace is federal domain
1958	Federal Aviation Act	Created FAA; modern regulatory framework
1962	Griggs v. Allegheny County	Supreme Court: airport owners liable for noise takings
1970	Airport and Airway Revenue Act	Established Airport and Airway Trust Fund; aviation excise taxes
1973	City of Burbank v. Lockheed Air Terminal	Supreme Court: federal preemption of local flight curfews
1978	Airline Deregulation Act	Ended economic regulation of airlines; preemption of state rate/route/service regulation
1982	Airport Improvement Program (AIP)	Modern federal grant program replacing prior programs
1990	Airport Noise and Capacity Act (ANCA)	Federal framework for airport noise restrictions; Part 161 process
1990	Passenger Facility Charge authorized	Aviation Safety and Capacity Expansion Act authorized PFCs; collection began June 1992
1996	DOT Rates and Charges Policy	Established fair-and-reasonable standards for airline fees
2000	PFC cap raised to $4.50	Last adjustment to PFC maximum; no change since
2001	Aviation and Transportation Security Act	Created TSA; federalized airport security
2018	FAA Reauthorization Act	Renamed privatization program to AIPP; removed participation caps
2021	Infrastructure Investment and Jobs Act	Approximately $25 billion for aviation infrastructure, including $19.6 billion for airport sponsors (BIL/IIJA)
2024	FAA Reauthorization Act of 2024	Extended AIP/PFC programs; increased federal share for small airports
2024	PFAS designated CERCLA hazardous substances	Airports face strict liability for AFFF groundwater contamination

Conclusion

Operating a U.S. airport means accepting a broad and layered regulatory framework. The Constitution gives the federal government authority over air commerce while preserving proprietor rights—but those rights are narrower than many assume. More than ten federal agencies have jurisdiction over airport operations. State and local governments add environmental, labor, zoning, and governance layers. And how an airport earns, spends, and borrows is subject to constraints that can last as long as the airport exists.

Within this framework, airports that structure governance for flexibility, negotiate Airline Use Agreements reflecting true costs, use PFCs and AIP strategically, and maintain consistent grant assurance compliance have demonstrated strong operational and financial performance—particularly those that treat the regulatory framework as the operating environment itself and allocate resources for compliance accordingly.

Appendix: Key Legal Citations

Constitutional Provisions

• Article I, Section 8, Clause 3 — Commerce Clause
• Article I, Section 8, Clause 1 — Spending Clause
• Article VI, Clause 2 — Supremacy Clause
• Amendment V — Takings Clause
• Amendment X — Reserved Powers to the States
• Amendment XIV — Due Process (applying Takings to states)

Federal Statutes

• 49 U.S.C. § 40103 — Sovereignty and use of airspace
• 49 U.S.C. § 40117 — Passenger Facility Charges
• 49 U.S.C. § 41713 — Preemption of state authority over prices, routes, services
• 49 U.S.C. § 47101 et seq. — Airport Improvement Program
• 49 U.S.C. § 47107 — Grant assurance conditions
• 49 U.S.C. § 47129 — Airport rates and charges disputes
• 49 U.S.C. § 47133 — Revenue use restriction
• 49 U.S.C. § 47134 — Airport Investment Partnership Program
• 26 U.S.C. § 103 — Tax-exempt bond interest
• 26 U.S.C. § 9502 — Airport and Airway Trust Fund
• 42 U.S.C. § 4321 et seq. — NEPA
• 42 U.S.C. § 6901 et seq. — RCRA
• 42 U.S.C. § 7401 et seq. — Clean Air Act
• 42 U.S.C. § 9601 et seq. — CERCLA/Superfund
• 33 U.S.C. § 1344 — Clean Water Act Section 404

Federal Regulations

• 14 CFR Part 77 — Safe, efficient use of navigable airspace
• 14 CFR Part 139 — Certification of airports
• 14 CFR Part 150 — Airport noise compatibility planning
• 14 CFR Part 158 — Passenger Facility Charges
• 14 CFR Part 161 — Notice and approval of airport noise and access restrictions
• 29 CFR § 1910.146 — Confined spaces (OSHA)
• 40 CFR Parts 260–273 — Hazardous waste management (RCRA)
• 47 CFR Part 87 — Aviation services (FCC)
• 49 CFR Parts 1540–1562 — Airport and air carrier security (TSA)
• 49 CFR Part 23 — ACDBE in airport concessions
• 49 CFR Part 26 — DBE in DOT financial assistance programs

Supreme Court Cases

• Gibbons v. Ogden, 22 U.S. 1 (1824) — Commerce Clause breadth
• Cooley v. Board of Wardens, 53 U.S. 299 (1852) — Dual sovereignty
• United States v. Causby, 328 U.S. 256 (1946) — Navigable airspace; takings
• Griggs v. Allegheny County, 369 U.S. 84 (1962) — Airport noise liability
• City of Burbank v. Lockheed Air Terminal, 411 U.S. 624 (1973) — Federal preemption of local noise curfews
• South Dakota v. Dole, 483 U.S. 203 (1987) — Conditional spending power
• Morales v. Trans World Airlines, 504 U.S. 374 (1992) — ADA preemption scope

FAA Orders and Advisory Circulars

• FAA Order 5190.6C — Airport Compliance Manual
• FAA Order 5100.38D — AIP Handbook
• AC 150/5100-19D — Guide for Airport Financial Reports
• AC 150/5190-4B — Airport Land Use Compatibility Planning
• AC 150/5190-6 — Exclusive Rights at Federally Obligated Airports
• AC 150/5190-8 — Minimum Standards for Commercial Aeronautical Activities