Employees are expected to observe the prohibitions on political activities set
forth in subchapter III of chapter 73 of title 5, United States Code; 18 U.S.C. 602,
603, 607, and 608; and Civil Service Rule IV, title 5, Code of Federal Regulations,
§4.1. Explanations of the restrictions are set forth in the Employee Handbook,
U.S. Civil Service Commission Pamphlet No. 20, and in the Federal Personnel Manual.