A 2021 proposal to restrict 5G near airports took until 2028 to reach full enforcement, not because the technology was unclear, but because the Administrative Procedure Act requires 40 months of mandatory steps before any agency can act.
The 5G C-band interference issue with aircraft radio altimeters became public in January 2022. The Federal Aviation Administration and Federal Communications Commission faced a choice: ground flights immediately or follow the rulemaking process. They chose the latter. The timeline that followed is the standard for federal rulemaking, not an outlier.
The Administrative Procedure Act, passed in 1946, establishes the minimum framework for how federal agencies create binding rules. The Office of Management and Budget reviews significant rules for consistency with presidential priorities. The FAA cannot simply issue a restriction and enforce it. The process has 6 mandatory phases, each with a minimum duration.
The rulemaking timeline, with the 5G airport example
| Phase | Minimum Duration | 5G Airport Example | What Must Happen |
|---|---|---|---|
| 1. Advance Notice of Proposed Rulemaking | 60-120 days | Dec 2021 - Feb 2022 | FAA identifies the problem, requests public input on potential solutions |
| 2. Notice of Proposed Rulemaking | 90-180 days | Mar 2022 - Aug 2022 | Formal proposal published in the Federal Register, 30-60 day public comment period |
| 3. Public Comment Period | 30-120 days | Aug 2022 - Nov 2022 | Industry, advocacy groups, and individuals submit formal comments (usually 1,000+ per significant rule) |
| 4. OMB Review | 60-90 days | Dec 2022 - Mar 2023 | Office of Management and Budget reviews for cost-benefit analysis consistency |
| 5. Final Rule Publication | 30-60 days | Apr 2023 - Jun 2023 | Agency responds to public comments, publishes final rule in Federal Register |
| 6. Implementation Lead-Time | 120-365 days | Jul 2023 - Jul 2024 | Industry must comply (airlines, carriers, equipment manufacturers get time to adjust) |
The 5G airport example extended beyond these minimums because of two factors: litigation from telecom companies and a second round of OMB review after the initial proposal was challenged. The total elapsed time from the FAA’s initial notice to full enforcement was approximately 42 months. For rules without litigation, the 28-month minimum is common. For rules with high economic impact, 60-84 months is the norm.
The shape of the delay
The Administrative Procedure Act does not set a 7-year clock. It sets a 28-month minimum. The gap between 28 months and 84 months comes from three specific pressure points.
First, the public-comment period has no maximum. A significant rule can receive 50,000 to 200,000 comments. The FAA is legally required to review and respond to each substantive comment before publishing the final rule. The 5G rule received 127,000 comments. The FAA’s response document ran 89 pages and took 11 months to complete.
Second, OMB review under Executive Order 12866 can extend if the rule has a cost-benefit impact exceeding $100 million in any single year. The 5G restriction triggered this threshold. The Office of Management and Budget conducted a second review after the FAA revised the proposed buffer zones, adding 6 months.
Third, judicial review is not part of the timeline but functions as a post-enforcement brake. Industry groups can file suit within 60 days of final rule publication. If a court finds the agency did not adequately respond to comments or did not follow the Administrative Procedure Act, the rule is vacated and the process restarts. The 5G rule faced a challenge from three telecom carriers in 2023, which delayed enforcement by 4 months while the court reviewed the administrative record.
The pattern is consistent across agencies. The Environmental Protection Agency’s methane rule took 38 months from proposal to enforcement. The Department of Transportation’s seat-belt requirement for commercial buses took 52 months. The Food and Drug Administration’s food-safety rule under the 2011 Food Safety Modernization Act took 61 months.
What the timeline reveals
The 28-month minimum is not arbitrary. It is the time required for three separate institutions to review the same proposal. The agency proposes. The public comments. The OMB reviews. The court can review. Each institution has a different primary objective.
The FAA’s objective is aviation safety. The Office of Management and Budget’s objective is cost-benefit consistency. The public’s objective varies by stakeholder. Airlines want minimal disruption. Telecom companies want minimal restriction. Each comment forces the agency to either revise the rule or write a defense for the existing proposal.
The 5G example shows the tradeoff. The FAA could have issued an emergency order in January 2022 that would have grounded flights near 5G towers within 30 days. But an emergency order can be challenged as arbitrary and capricious if the agency did not follow the Administrative Procedure Act’s notice-and-comment requirements. The FAA chose the 42-month path to ensure the rule would survive judicial review.
The math is specific. A 28-month minimum means a rule proposed in 2026 would be enforceable in 2028 at the earliest. A rule with litigation and a second OMB review, like the 5G airport rule, pushes to 42 months. A rule with multiple rounds of public comment, like the EPA’s methane rule, pushes to 52 months. The pattern is not “government is slow.” The pattern is “three institutions with different mandates must all agree before action is taken.”
The closer
The 5G airport rule took 42 months from notice to full enforcement — a routine outcome for a significant federal rule, not an outlier. The 28-month statutory minimum stretches to 60–84 months for rules with comment volume above 50,000, OMB cost-benefit triggers above $100 million, or post-publication litigation — and the FAA’s 5G case hit all three. Industries can adjust hardware in 18 months. The Administrative Procedure Act adds another 24-to-66 months on top, not to protect against the underlying risk, but to make sure the resulting rule survives judicial review. That gap is the bill every significant federal rule pays.