(1) Beginning on the transition date and ending upon the member’s termination of employment or attainment date, as applicable under section 59(1), each member who made the election under section 59(1) shall contribute an amount equal to a percentage of his or her compensation to the reserve for employee contributions or to the member investment plan as set forth in subdivision (a) or (b), as applicable, to provide for the amount of retirement allowance that is calculated only on the credited service accrued and compensation for that member on or after the transition date. Subject to subsection (2), the member shall not contribute any amount under this subsection for any years of credited service accrued or compensation before the transition date. Subject to subsection (2), the amount to be contributed under this subsection is as follows:

  (a) For a member who does not contribute to the member investment plan as of September 3, 2012, 4% of compensation to the reserve for employee contributions.

  (b) For a member who does contribute to the member investment plan as of September 3, 2012, 7% of compensation to the member investment plan.

  (2) The retirement system shall determine a method of deducting the contributions provided for in this section from the compensation of each member for each payroll and each payroll period. The contributions under subsection (1) shall not exceed the total normal cost contribution rate.

  (3) The employer shall pick up the member contributions required by subsection (1) for all compensation on or after the transition date. Contributions picked up shall be treated as employer contributions in determining tax treatment under the internal revenue code. The employer shall pay these member contributions from the same source of funds that is used in paying compensation to the member.

  (4) A member is entitled to the benefit of all contributions made under this section in the same manner as provided under section 29.