Section 6621. Unabsorbed portions of premium payments

(a) Subject to the
  requirements of this article for the  accumulation  and  maintenance  of
  minimum surplus, the surplus of any advance premium corporation shall be
  eligible  for  equitable  distribution  to  its  members  as  unabsorbed
  portions of premium payments;  but  no  unabsorbed  portion  of  premium
  payments  shall  be  returned  or  distributed  until  authorized by the
  corporation's  board  of   directors   nor   until   approved   by   the
  superintendent.
    (b)  In  authorizing  any such return of unabsorbed portion of premium
  payments, the board of directors of such a corporation may  provide  for
  an  apportionment  thereof among separate groups of members on the basis
  of earned premiums equitably classified  according  to  major  kinds  of
  insurance.
    (c)  This  section  shall  not  prohibit  the return of the unabsorbed
  portion of premium payments on an equitable basis  to  policyholders  in
  other states or under reinsurance contracts.