The maximum premium shall be expressed in the policy of a mutual company, and it may be solely a cash premium, or may be a cash premium and an additional contingent premium, which contingent premium shall be not less than the cash premium, but no mutual company, except as otherwise provided in § 31-2502.14, shall issue any policy for a cash premium without an additional contingent premium until and unless it possesses a surplus of not less than $600,000.
D.C. Code § 31-2502.25