SDCL § 58-34-39: Computation of amounts of assessments--Ratio of deficiency to premiums earned.

Each subscriber's share of a deficiency for which an assessment is made, but not exceeding in any event his aggregate contingent liability as provided by this chapter, shall be computed by applying to the premium earned on the subscriber's policy or policies during the period to be covered by the assessment, the ratio of the total deficiency to the total premiums earned during such period upon all policies subject to the assessment.