At least ____ days prior to the effective date, part 161 airports must publish notices in local newspapers and post notices that are accessible to users and the public.

• A. 90
• B. 180
• C. 365
• D. 60

Answer: (B)

Public notice lead time is the key idea here. For FAA Part 161 actions, airport sponsors must give the public ample opportunity to learn about proposed changes before they take effect. Publishing notices in local newspapers and posting notices accessible to users and the public must happen at least 180 days prior to the effective date. This six-month window allows time for review, comment, and coordination with stakeholders, ensuring the community has a real chance to participate.

Why this is the best choice: 180 days balances the need for public involvement with the FAA’s timeline for processing these actions. It’s long enough to gather input and address concerns, yet not so long that it unduly delays necessary airport-related changes.

Shorter windows (like 90 or 60 days) would rush public involvement, while a full year (365 days) is not the stated requirement and would unnecessarily slow the process.