Regulations last checked for updates: Jan 30, 2025

Title 14 - Aeronautics and Space last revised: Jan 22, 2025
§ 99.17 - Deviation from flight plans and ATC clearances and instructions.

(a) No pilot may deviate from the provisions of an ATC clearance or ATC instruction except in accordance with § 91.123 of this chapter.

(b) No pilot may deviate from the filed IFR flight plan when operating an aircraft in uncontrolled airspace unless that pilot notifies an appropriate aeronautical facility before deviating.

(c) No pilot may deviate from the filed DVFR flight plan unless that pilot notifies an appropriate aeronautical facility before deviating.

[69 FR 16756, Mar. 30, 2004]
authority: 49 U.S.C. 106(g), 40101, 40103, 40106, 40113, 40120, 44502, 44721
source: Docket No. 25113, 53 FR 18217, May 20, 1988, unless otherwise noted.
cite as: 14 CFR 99.17