A retired person who has not attained the normal retirement age shall have a bona fide separation in service to the extent required by the Internal Revenue Code, and the regulations promulgated thereunder, before working after retirement pursuant to this article. The board shall establish, by regulation, the criteria under which a bona fide separation is satisfied.

(Added by Stats. 2003, Ch. 519, Sec. 19. Effective January 1, 2004.)