(1) Notwithstanding section 6 or any predecessor to section 6, the remarriage of a surviving spouse shall not render the surviving spouse ineligible to receive a pension described in section 6(1)(i) or a duty death pension described in section 6(2)(a). A surviving spouse whose pension described in section 6(1)(i) or duty death pension described in section 6(2)(a) was terminated due to the surviving spouse’s remarriage shall be eligible to receive that pension or duty death pension beginning on the first day of the month following the month in which written application for reinstatement is filed with the board, but shall not be eligible to receive the pension or duty death pension attributable to any month beginning before the month of reinstatement under this section.

  (2) Beginning on the effective date of the amendatory act that amended this subsection, the provisions of subsection (1) that apply to a surviving spouse who is eligible to receive a pension described in section 6(1)(i) shall apply to a municipality upon approval by resolution of the governing body of the municipality.

  (3) Beginning on the effective date of the amendatory act that added this subsection, a surviving spouse who is eligible to receive a duty death pension described in section 6(2)(a) and who remarries after the effective date of the amendatory act that added this subsection shall not be denied a duty death pension described in section 6(2)(a) by a municipality because of the remarriage of the surviving spouse.