(b) Every group contract between a plan and an employer subject to this article that is issued, amended, or renewed on or after July 1, 1998, shall require the employer to notify qualified beneficiaries currently receiving continuation coverage, whose continuation coverage will terminate under one group benefit plan prior to the end of the period the qualified beneficiary would have remained covered, as specified in Section 1366.27, of the qualified beneficiary's ability to continue coverage under a new group benefit plan for the balance of the period the qualified beneficiary would have remained covered under the prior group benefit plan. This notice shall be provided either 30 days prior to the termination or when all enrolled employees are notified, whichever is later. Every health care service plan and specialized health care service plan shall provide to the employer replacing a health care service plan contract issued by the plan, or to the employer's agent or broker representative, within 15 days of any written request, information in possession of the plan reasonably required to administer the notification requirements of this subdivision and subdivision (c).