(a) A contract between a health maintenance organization and a group contract holder must provide that:
(1) in addition to any other premiums for which the group contract holder is liable, the group contract holder is liable for an enrollee’s premiums from the time the enrollee is no longer part of the group eligible for coverage under the contract until the end of the month in which the contract holder notifies the health maintenance organization that the enrollee is no longer part of the group eligible for coverage by the contract; and
(2) the enrollee remains covered by the contract until the end of that period.
(b) Each health maintenance organization that enters into a contract described by Subsection (a) shall notify the group contract holder periodically as provided by this section that the contract holder is liable for premiums on an enrollee who is no longer part of the group eligible for coverage under the contract until the health maintenance organization receives notification of termination of the enrollee’s eligibility for that coverage.

(c) If the health maintenance organization charges the group contract holder on a monthly basis for the coverage premiums, the health maintenance organization shall include the notice required by Subsection (b) in each monthly statement sent to the group contract holder. If the health maintenance organization charges the group contract holder on other than a monthly basis for the premiums, the health maintenance organization shall notify the group contract holder periodically in the manner prescribed by the commissioner by rule.
(d) The notice required by Subsection (b) must include a description of methods preferred by the health maintenance organization for notification by a group contract holder of an enrollee’s termination from coverage eligibility.