Any new or existing group policy or contract holder for whom coverage under an accident and sickness insurance policy is issued or renewed by an insurer or for whom coverage under a contract is issued or renewed by a corporation licensed pursuant to Chapter 42 (§ 38.2-4200 et seq.) of this title, shall be given the option to purchase any coverage, benefits or services first mandated under this chapter on or after July 1, 1982, provided that all mandated coverages as of June 30, 1982, will not be affected.