Cal. Ins. Code § 11120
When a society, or a class or section thereof, has assets equal to the reserves and credits on its policies, it may collect periodical or other contributions from the members of the society, class or section which, with interest accretions, will be sufficient to accomplish all the following:
(d) Maintain assets equal to the reserves and credits.
Societies not operating pursuant to this section shall comply with Section 11121.