The following definitions apply for purposes of this part.

(a) Postal Service. The United States Postal Service as established by 39 U.S.C. 201.

(b) Employee. An individual appointed to a position, temporary or permanent, within the Postal Service, or hired as an executive under an employment contract, including a substitute or a special employee as defined by 18 U.S.C. 202(a). The term “employee” does not include the Governors of the Postal Service.