N.D. Cent. Code § 26.1-12-20: Separate reserves to be maintained for each kind of insurance written by mutual insurance company

Every mutual insurance company organized under this chapter shall maintain unearned premium and other reserves separately for each kind of insurance written by it upon the same basis as is required of a domestic stock insurance company transacting the same kind of insurance business. Any reserve for losses or claims based upon the premium income, however, must be computed upon the net premium income after deducting any so-called dividend or premium returned or credited to the member.