Okla. Stat. tit. 74, § 74-3110: Utility bills exempt

This act shall not apply to monthly billings submitted to the

state or any county or local subdivision of the state for public

utility companies, electric cooperatives or telephone companies,

whose services are regulated by the Oklahoma Corporation Commission

nor to said utility companies, electric cooperatives or telephone

companies for billings pertaining to installations or changes in

service, where tariffs for such charges or billings by said

companies are on file with the Oklahoma Corporation Commission.