5 CFR 332.301 - Termination of eligibility.
(a) Except as provided in paragraph (b) of this section, a person's eligibility on a register is terminated when:
(1) He accepts a career or career-conditional appointment from the register; or
(2) OPM terminates the eligibility of all persons on the register.
(b) OPM may determine that in particular types of cases eligibility may not be terminated in less than 1 year. OPM shall publish the conditions under which eligibility may not be terminated in less than 1 year.