Terms used in this part shall have the following meaning:

Agency automatic (1%) contributions means any contributions made under 5 U.S.C. 8432(c)(1);

CSRS means the Civil Service Retirement System established by 5 U.S.C. chapter 83, subchapter III, and any equivalent Federal Government retirement plan;

CSRS employee means any employee, Member, or participant covered by CSRS, including employees authorized to contribute to the Thrift Savings Plan under 5 U.S.C. 8351, or 5 U.S.C. 8440a to 8440d;

FERS means the Federal Employees’ Retirement System established by 5 U.S.C. chapter 84, and any equivalent Federal Government retirement plan;

FERS employee means an employee, Member, or participant covered by FERS;

First conversion contributions refers to the retroactive agency contributions, including interest on these contributions, made under 5 U.S.C. 8432(c)(3)(C) to the TSP accounts of employees who were automatically converted to the Federal Employees’ Retirement System on January 1, 1987;

Individual account means the total of all sums contributed to the Thrift Savings Plan by or on behalf of a CSRS employee or FERS employee, plus earnings allocated to the employee's account under 5 CFR part 1645;

Separation date means the effective date of an employee's separation from Government service;

Separation from Government service has the same meaning as provided in 5 CFR 1650.3;

Service means:

(1) Any non-military service that is creditable under either 5 U.S.C. chapter 83, subchapter III, or 5 U.S.C. 8411, provided however, that such service is to be determined without regard to any time limitations, any deposit or redeposit requirements contained in those statutory provisions after performing the service involved, or any requirement that the individual give written notice of that individual's desire to become subject to the retirement system established by 5 U.S.C. chapters 83 or 84; or

(2) Any military service creditable under the provisions of 5 U.S.C. 8432b(h)(1) and the regulations issued at 5 CFR part 1620, subpart H;

Vested means those amounts in an individual account which are nonforfeitable; and

Year of service means one full calendar year of service.