The limited health service organization shall issue to each subscriber or enrollee a group contract or evidence of coverage. Any such group contract or evidence of coverage shall provide for the rendering of limited health services as defined therein for a period of 12 months from the date of issuance; and shall provide that it shall be renewed from year to year unless there has been 31 days written notice of termination prior to the annual renewal of the contract by the subscriber, enrollee or the limited health service organization. The group contract, evidence of coverage and related material shall be delivered or issued for delivery to an enrollee within 30 days from the later of the effective date of coverage or the date on which the limited health service organization is notified of enrollment.