(1) All classified employees who first become employed by an employer in an eligible position on or after July 1, 2007, shall have a period of ninety days to make an irrevocable choice to become a member of plan 2 or plan 3. At the end of ninety days, if the member has not made a choice to become a member of plan 2, he or she becomes a member of plan 3 or plan 2 as follows:
(a) Becomes a member of plan 3 if first employed by an employer in an eligible position on or after July 1, 2007, but prior to July 1, 2020;
(b) Becomes a member of plan 2 if first employed by an employer in an eligible position on or after July 1, 2020.
(2) For administrative efficiency, until a member elects to become a member of plan 3, or becomes a member of plan 3 by default under subsection (1) of this section, the member shall be reported to the department in plan 2, with member and employer contributions. Upon becoming a member of plan 3 by election or by default, all service credit shall be transferred to the member's plan 3 defined benefit, and all employee accumulated contributions shall be transferred to the member's plan 3 defined contribution account.