(2) For current employees, membership service may be established for periods of employment with an employer prior to the employer's admission into the retirement system by making the payments required by this section. The employer must select one of the options in this subsection and apply it uniformly, except as provided in subsection (3) of this section. The required payment shall include the total member and employer contributions that would have been required from the date of each current member's hire.
(a) Option A: The employer makes all the required payments within fifteen years from the date of the employer's admission.(b) Option B: The employer makes a portion of the required payments and the member pays the balance. The employer shall not be required to make its payments until the member has made his or her payments. Each member shall have the option to purchase the membership service.(c) Option C: The member makes all of the required payments. Each member shall have the option to purchase the membership service. All payments under options B and C of this subsection must be completed within five years from the date of the employer's admission, or prior to the retirement of the member, whichever occurs sooner. A member may not receive membership service credit under option B or C of this subsection until all required payments have been made.