RSA 402:2 Contingent Liability.

Any mutual fire or casualty insurance company organized under the laws of this state, which charges a full cash premium, may limit the liability of policyholders to assessment by a stipulation in the policy, which shall have the same effect as a deposit note signed by the insured; but such contingent liability of a member shall not be less than an amount equal to and in addition to the cash premium written in his policy. Any such mutual fire insurance company, from and after May 20, 1941, and any such mutual casualty insurance company, from and after January 1, 1943, may issue nonassessable policies in this state upon compliance with the following requirements:
I. It shall have and at all times maintain a surplus to policyholders as determined from its latest annual statement