PUBLIC LAW 86-682-SEPT. 2, 1960
(b) As the needs of the service require, the Postmaster General may assign an employee from time to time to perform, without change in compensation, duties, and responsibilities, other than the duties and responsibilities specifically set forth in his position description. If an employee is assigned for more than thirty days in a calendar year to duties and responsibilities of a salary level which is higher than the salary level to which his position is assigned, except to perform service in a relief capacity for a supervisor granted compensatory time pursuant to section 3573 of this title, the Postmaster General shall pay for the period of his assignment in excess of thirty days, a basic salary computed in accordance with the provisions of section 3559 of this title. (c) The Postmaster General, with the consent of the Administrator of General Services, may appoint custodial employees working under the jurisdiction of the General Services Administration at Federal buildings occupied in part by the Postal Service to positions in the Postal Service to perform postal duties in addition to their regular duties as custodial employees, and he shall pay compensation to them at the rate provided by law without regard to sections 58, 62, 69, and 70 of title 5. § 3336. Detail to stations of Armed Forces Whenever the Postmaster General deems it necessary in serving the camps, posts, or stations of the Armed Forces and defense or other strategic installations, he may— (1) detail field postal employees from niain post offices to postal units at those installations without changing their official station; and (2) pay them an allowance, in lieu of actual expenses, of not more than $4 for each day while so detailed, without regard to chapter 16 of title 5. s use sas et seq. § 3337. Promotions and assignment of rural carriers (a) The seniority status of a rural carrier commences on the day of appointment as a regular rural carrier. Upon voluntary transfer from one post office to another, or another branch of the service into the rural delivery service, the relative seniority of the transferee commences on the day he enters the rural delivery service of the office to which transfer is made. (b) A rural carrier shall be assigned by the Postmaster General to the least desirable route upon entering the service and shall rise to the more desirable routes by seniority. (c) The Postmaster General shall base promotions and preferential assignments in the rural delivery service upon seniority and ability. If ability be sufficient, seniority shall govern. § 3338. Filling vacancies on rural routes (a) The Postmaster General shall post a notice in the post office of each new or vacant rural route and give all rural carriers attached to the office opportunity to apply. (b) A rural carrier assigned to a new or vacant route has ninety days in which to demonstrate his fitness for the assignment. He may not be removed therefrom until his inability to fill the assignment is proven. The Postmaster General shall return any carrier so removed to his former position. (c) A senior rural carrier whose application for a new or vacant route is denied, or who is removed therefrom under subsection (b) of this section shall be furnished a written statement of the reasons for the action. He has the right, upon written request, to a hearing before a person designated by the Postmaster General.