Okla. Stat. tit. 68, § 323

The sale of such exempted cigarettes shall be restricted to sales or distribution to patients or inmates of veterans hospitals and residents of state operated domiciliary homes for veterans, as shown by the records thereof, for their own personal use and consumption. Possession of twenty (20) or more of such exempted cigarettes by persons other than such inmates, patients or residents shall be deemed prima facie evidence of intention to evade payment of the stamp excise tax levied thereon, and shall be punishable as is provided by Section 305 of this Code.