Cal. Ins. Code § 10222
Life insurance conforming to all the following conditions is one form of blanket life insurance:
(e) Insuring persons without any requirement for individual enrollment and without individual commitment or undertaking to pay, and with either the policyholder or the insured to pay all the premium or part of the premium as a condition precedent to coverage.
Nothing in this section shall be construed to prohibit the cost of the insurance coverage being borne by the individuals insured or by their parents or guardians. When the premium for the insurance is paid by the person insured, he may, upon request, obtain from the insurer in certificate form a copy of the policy.
Coverage shall not be provided to any person who files with the entity to whom the blanket policy is to be issued, for delivery to the insurer, a written statement requesting that he not be covered. In the case of a minor, such statement may be filed by his parent or guardian. If the number of persons filing such statements exceeds ten percent (10%) of the number of persons within categories defined as covered under the policy, it shall not be put into effect, and if in effect shall not be renewed.