In the event of an insolvency of an HMO, the commissioner may order that all such carriers that participated in the enrollment process with the insolvent HMO shall offer the group’s enrollees of the insolvent HMO a 30-day enrollment period commencing on the day of insolvency. Under such order each carrier shall offer to each enrollee of the insolvent HMO the same coverages that such insolvent HMO had offered to each enrollee of the group at such group’s last regular enrollment period at rates determined in accordance with the successor HMO’s existing rating methodology.