Sec. 9. CONTRIBUTIONS BY THE CITY. (a) Beginning with the year 2017 effective date, the city shall make contributions to the pension system for deposit into the fund as provided by this section and Section 9A, 9B, 9D, or 9E of this article, as applicable. The city shall contribute:

(1) beginning with the year 2017 effective date and ending with the fiscal year ending June 30, 2018, an amount equal to the city contribution rate, as determined in the initial risk sharing valuation study conducted under Section 9B of this article and adjusted under Section 9D or 9E of this article, as applicable, multiplied by the pensionable payroll for the fiscal year; and

(2) for each fiscal year after the fiscal year ending June 30, 2018, an amount equal to the city contribution rate, as determined in a subsequent risk sharing valuation study conducted under Section 9A of this article and adjusted under Section 9D or 9E of this article, as applicable, multiplied by the pensionable payroll for the applicable fiscal year.

(b) Except by written agreement between the city and the board under Section 27 of this article providing for an earlier contribution date, at least biweekly, the city shall make the contributions required by Subsection (a) of this section by depositing with the pension system an amount equal to the city contribution rate multiplied by the pensionable payroll for the biweekly period.

(c) With respect to each fiscal year:

(1) the first contribution by the city under this section for the fiscal year shall be made not later than the date payment is made to employees for their first full biweekly pay period beginning on or after the first day of the fiscal year; and

(2) the final contribution by the city under this section for the fiscal year shall be made not later than the date payment is made to employees for the final biweekly pay period of the fiscal year.

(d) In addition to the amounts required under this section, the city may at any time contribute additional amounts to the pension system for deposit in the pension fund by entering into a written agreement with the board in accordance with Section 27 of this article.

(e) The governing body of a city to which this article applies by ordinance or resolution may provide that the city pick up active member contributions required by Section 8 of this article so that the contributions of all active members of the pension system qualify as picked-up contributions under Section 414(h)(2) of the code. If the governing body of a city adopts an ordinance or resolution under this section, the city, the board, and any other necessary party shall implement the action as soon as practicable. Contributions picked up as provided by this subsection shall be included in the determination of an active member's pay, deposited to the individual account of the active member on whose behalf they are made, and treated for all purposes, other than federal tax purposes, in the same manner and with like effect as if they had been deducted from the salary of, and made by, the active member.

(f) Only amounts paid by the city to the pension system shall be credited against any amortization schedule of payments due to the pension system under this article.

(g) Subsection (f) of this section does not affect changes to an amortization schedule of a liability layer under Section 9A(a)(6)(F), 9B(i), or 9D(c)(4) of this article.

(h) Notwithstanding any other law and except for the pension obligation bond assumed under Section 9B(d)(2) of this article, the city may not issue a pension obligation bond to fund the city contribution rate under this section.