5 U.S. Code § 5903
5.U.S. Code § 5903 is about Regulations. It is under Subchapter I (Uniforms) of Chapter 59 (Allowances) of Subpart D (Pay and Allowances) of Part III (Employees) of Title 5 (Government Organizations and Employees) of the Code.
The Office of Personnel Management may prescribe such regulations as it considers necessary for the administration of this subchapter.