(1) These rules apply to each group contract, providing health care benefits, issued or delivered in Montana after the effective date of these rules.

(2) A group contract, providing health care benefits, issued or delivered in Montana before the effective date of these rules must be brought into compliance with these rules by the later of:

(a) the next anniversary date or renewal date of the group contract; or

(b) the expiration of any applicable collectively bargained contract pursuant to which it was written.