39 C.F.R. § 111.1 Mailing Standards of the United States Postal Service, Domestic Mail Manual; incorporated by reference of regulations governing domestic mail services.
Title 39 - Postal Service
Section 552(a) of title 5, U.S.C., relating to the public information requirements of the Administrative Procedure Act, provides in pertinent part that “* * * matter reasonably available to the class of persons affected thereby is deemed published in the [62 FR 14827, Mar. 28, 1997, as amended at 69 FR 59139, Oct. 4, 2004; 70 FR 14535, Mar. 23, 2005]
Title 39: Postal Service
PART 111—GENERAL INFORMATION ON POSTAL SERVICE
§ 111.1 Mailing Standards of the United States Postal Service, Domestic Mail Manual; incorporated by reference of regulations governing domestic mail services.

