14 CFR 325.12: Service of documents.

Any person, except one filing individually as a consumer, who files a document under this part, including responses to the questionnaire, shall serve that document upon those listed in § 325.4(a) of this part and upon the following:

(a) The governor of the State in which the eligible place is located;

(b) Each air carrier providing scheduled service to the affected eligible place;

(c) In the case of a responsive document, the one who filed the document to which it responds; and

(d) The U.S. Postal Service, Assistant General Counsel, Transportation Division, Law Department, Washington, D.C. 20260.