(a) The board of trustees may equitably allocate to each health benefit plan the employer contributions that would be required to fund basic health coverage for participants in the plans to the extent funds are available.
(b) In allocating the employer contributions among plans, the board of trustees shall consider the relevant risk characteristics of each plan’s enrollment, including:
(1) demographic variations in the use and cost of health care; and
(2) prevailing cost patterns in the area in which the plan operates.
(c) The allocation must be reasonable and set in a manner that ensures participants a fair choice among health benefit plans providing a basic plan.
(d) The contribution set for each participant must be within the total amount appropriated in the General Appropriations Act.