(a) Subject to the limitations of this subtitle, the board of trustees may adopt rules for:
(1) eligibility of membership;
(2) the administration of the funds of the retirement system;
(3) the program of supplemental benefits for law enforcement and custodial officers;
(4) hearings on contested cases or disputed claims; and
(5) the transaction of any other business of the board.
(b) Rules adopted under this section related to a hearing on a contested case or disputed claim control over rules adopted under § 2003.050.