Section 41-1437 - MAKING AND USE OF RATES(1) As to all rates which are subject to this chapter, due consideration shall be given to past and prospective loss experience within and outside this state, to the conflagration and catastrophe hazards, to a reasonable margin for underwriting profit and contingencies, to dividends, savings or unabsorbed premium deposits allowed or returned by insurers to their policy holders, members or subscribers, to past and prospective expenses both countrywide and those specifically applicable to this state, and to all other relevant factors, including judgment factors, within and outside this state; and in the case of fire insurance rates, consideration shall be given to the experience of the fire insurance business during a period of not less than the most recent five (5) year period for which such experience is available.(2) The systems of expense provisions included in the rates for use by an insurer or group of insurers may differ from those of other insurers or groups of insurers to reflect the requirements of the operating methods of any such insurer or group with respect to any kind of insurance, or with respect to any subdivision or combination thereof for which subdivision or combination separate expense provisions are applicable.(3) Risks may be grouped by classification for the establishment of rates and minimum premiums. Classification rates may be modified to produce rates for individual risks in accordance with rating plans which establish standards for measuring variations in hazards or expense provisions, or both. Such standards may measure any difference among risks that can be demonstrated to have a probable effect upon losses or expenses. Such classifications and modifications shall apply to all risks under the same or substantially the same circumstances or conditions.[I.C., sec. 41-1437, as added by 1969, ch. 306, sec. 14, p. 917.]