(1) Except as otherwise specifically provided in ARM 6.6.507, 6.6.507C, 6.6.508, 6.6.509, 6.6.515 and 6.6.521, this subchapter shall apply to:

(a) all Medicare supplement policies delivered or issued for delivery in this state on or after February 1, 1982, the effective date of this subchapter; and

(b) all certificates which have been delivered or issued for delivery in this state and issued under group Medicare supplement policies.

(2) This subchapter does not apply to a policy or contract of one or more employers or labor organizations, or of the trustees of a fund established by one or more employers or labor organizations, or combination, for employees or former employees, or a combination, or for members or former members, or a combination, of the labor organizations.