14 CFR 323.5 - Time for filing notices.
(a) Except as specified by paragraph (b) of this section, a notice required by § 323.3 shall be filed at least:
(1) 90 days before the intended termination, suspension, or reduction, if it is filed by a certificated carrier or by an uncertificated carrier receiving compensation under 49 U.S.C. 41731- 4174241731-41742 for service to the place;
(2) 30 days before the intended termination, suspension, or reduction, if it is filed by an uncertificated carrier not receiving compensation under section 419 of the Act for service to the place.