Cal. Health & Safety Code § 1374.21
(a)
(2) A change on premium rates or changes in coverage stated in a large group health care service plan contract shall not become effective unless the plan has delivered a written notice indicating the change or changes at least 120 days before the contract renewal effective date. The notice for large group health plans shall include the following information:
(c)
(2) The notification to the contractholder shall be developed by the department and shall include the following statements in 14-point type: