[Code of Federal Regulations] [Title 5, Volume 1, Parts 1 to 699] [Revised as of January 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 5CFR550.901] [Page 532] TITLE 5--ADMINISTRATIVE PERSONNEL CHAPTER I--OFFICE OF PERSONNEL MANAGEMENT PART 550--PAY ADMINISTRATION (GENERAL)--Table of Contents Subpart I--Pay for Duty Involving Physical Hardship or Hazard Sec. 550.901 Purpose. Authority: 5 U.S.C. 5545(d), 5548(b). This subpart prescribes the regulations required by sections 5545(d) and 5548(b) of title 5, United States Code, for the payment of differentials for duty involving unusual physical hardship or hazard to employees. [56 FR 20344, May 3, 1991]