DOT will issue a determination of the essential level of air service for a place within 6 months after each of the following events:

(a) A notice is received that service to an eligible place will be reduced to only one carrier that holds a section 41102 certificate;

(b) A place is designated as an eligible place under 49 U.S.C. 41731 and either paragraph (c) or (d) of this section or §325.7(e); or

(c) A review was conducted of essential air service of that place under §325.6.

[Doc. No. DOT-OST-2014-0140, 84 FR 15938, Apr. 16, 2019]