Okla. Stat. tit. 68 § 315
For the purpose of enabling the Oklahoma Tax Commission to determine the tax liability of a distributor, wholesale dealer, retail dealer, distributing agent or any other person dealing in cigarettes, or to determine whether a tax liability has been incurred, it shall have the right to inspect any premises where cigarettes are manufactured, produced, made, stored, transported, sold, or offered for sale or exchange, and to examine all of the records required herein to be kept or any other records that may be kept incident to the conduct of the cigarette business of such distributor, wholesale dealer, retail dealer, distributing agent, or any other person dealing in cigarettes. The authorized agent of the Oklahoma Tax Commission shall also have the right, as an incident, to determine the said tax liability, or whether a tax liability has been incurred, to examine all stocks of cigarette stamps, and for the foregoing purpose such authorized agent shall also have the right to remain upon the premises for such length of time as may be necessary to fully determine such tax liability, or whether a tax liability has been incurred; and it shall be unlawful for any of the foregoing persons to fail to produce upon demand by the Tax Commission, or any of its authorized agents, any records herein required to be kept, or to hinder or prevent in any manner the inspection of said records, or the examination of said premises.
Okla. Stat. tit. 68, § 315