29 CFR 457.11: Agency, employee, labor organization, dues, Department, activity, employing office.

Agency, employee, labor organization, and dues, when used in connection with the CSRA, have the meanings set forth in 5 U.S.C. 7103. Employee, labor organization, and dues, when used in connection with the FSA, have the meanings set forth in 22 U.S.C. 4102; Department, when used in connection with the FSA, means the Department of State, except that with reference to the exercise of functions under the FSA with respect to another agency authorized to utilize the Foreign Service personnel system, such term means that other agency. Covered employee, employee, employing office, and agency, when used in connection with the CAA, have the meanings set forth in 2 U.S.C. 1301 and 1351(a)(2). Activity means any facility, organizational entity, or geographical subdivision or combination thereof of any agency or employing office.