Okla. Stat. tit. 36, § 36-6001: Discrimination through fictitious grouping prohibited

No insurer, admitted or nonadmitted, shall make available

through any rating plan or form, property, marine, vehicle, casualty

or surety insurance to any firm, corporation, or association of

individuals, any preferred rate or premium based upon any fictitious

grouping of such firm, corporation or association of individuals.