39 C.F.R. § 267.4
(a) The Postal Service will operate under a uniform set of information security standards which address the following functional aspects of information flow and management:
(b) Supplementing this list are information security standards pertaining to the following administrative areas:
[40 FR 45726, Oct. 2, 1975; 40 FR 48512, Oct. 16, 1975]