The systems of expense provisions included in the rates for use by any insurer, group of insurers or sponsor may differ from those of other insurers, group of insurers or sponsors, to reflect the requirements of the operating method of any insurer, group of insurers or sponsors with respect to any kind of insurance, or with respect to any subdivision or combination thereof for which the subdivision or combination of separate expense provisions are applicable.
Risks may be grouped by classifications 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 in experience, or in expense provisions, or in all three (3) factors.
Except to the extent necessary to meet the provisions of subsection (1) of this section, uniformity among insurers or sponsors in any matters within the scope of this section is neither required nor prohibited.
Miss. Code § 83-49-17