Cal. Gov. Code § 22957

A person who was enrolled in a dental care plan at the time he or she became an annuitant under state or federal provisions, may continue his or her enrollment, including eligible family members, without discrimination as to premium rates or benefit coverage. The dental care plans may require part of a monthly premium to be paid by the annuitant, not to exceed the premium paid by represented or excluded employees, whichever is less, for the state-sponsored indemnity dental plan. The premium to be paid by the annuitant shall be deducted from his or her monthly allowance.