(a) Notwithstanding any other provision of this chapter, a school district employee who is eligible for coverage under a large or small employer health benefit plan providing coverage to the school district’s employees and who is the spouse of another school district employee covered under the plan may elect whether to be treated under the plan as:
(1) an employee; or
(2) the dependent of the other employee.
(b) The commissioner shall adopt rules under Section 1501.010 governing the manner in which an election under this section must be made.