CFR /  Title 5  /  Part 842  /  Sec. 842.103 General.

To be covered under FERS, an individual must:

(a) Be an employee, Member, or specifically covered by another provision of law;

(b) Be covered by social security;

(c) Have retirement deductions withheld from pay and have agency contributions made; and

(d) Be paid based on units of time. Except as provided in Sec. 842.104 and as excluded by Sec. 842.105, an employee or Member is covered by FERS.