If an individual in receipt of an annuity renders compensated service, he shall not be paid an annuity with respect to any month in which such service is rendered to:
(a) An employer;
(b) Any person whether or not an employer by whom he was most recently employed when his annuity begins to accrue;
(c) Any person with whom he held, at the time the annuity begins to accrue, any rights to return to service;
(d) Any person with whom he ceased service in order to have his annuity begin to accrue.
[Board Order 60-2, 25 FR 593, Jan. 23, 1960; 25 FR 1074, Feb. 6, 1960. Redesignated at 47 FR 7656, Feb. 22, 1982]