Except as provided by an enactment of the general assembly, an election by an employer under:

1. (1) section 8(f) of this chapter concerning the payment of a retired employee's premium; or

2. (2) section 8(j) of this chapter concerning Medicare coverage and program eligibility;

   may not be revoked or altered at any time by the employer or a subsequent employer to the detriment of a person entitled to benefits under section 8.2 of this chapter.

As added by P.L.184-2001, SEC.6.