Sec. 9F. UNILATERAL DECISIONS AND ACTIONS PROHIBITED. (a) Notwithstanding Section 6(f) or 5B of this article, the board may not change, terminate, or modify Sections 9 through 9E of this article.

(b) No unilateral decision or action by the board is binding on the city and no unilateral decision or action by the city is binding on the pension system with respect to the application of Sections 9 through 9E of this article unless expressly provided by a provision of those sections. Nothing in this subsection is intended to limit the powers or authority of the board.