14 C.F.R. § 152.321 Notice of delay or acceleration.
Title 14 - Aeronautics and Space
(a) The sponsor or planning agency shall promptly notify the FAA of each condition or event that may delay or accelerate accomplishment of the project. (b) In the event that delay is anticipated, the notice required by paragraph (a) of this section must include— (1) A statement of actions taken or contemplated; and (2) Any Federal assistance needed.
Title 14: Aeronautics and Space
PART 152—AIRPORT AID PROGRAM
Subpart D—Accounting and Reporting Requirements
§ 152.321 Notice of delay or acceleration.