When a dealer purchases, acquires, transports, or imports into this state a controlled dangerous substance on which a tax is levied by Section 2 of this act, the dealer shall have the stamp affixed on the controlled dangerous substance immediately after receiving the controlled dangerous substance. Each stamp may be used only once.
Taxes imposed upon controlled dangerous substances by Section 2 of this act are due and payable immediately upon acquisition or possession of a controlled dangerous substance in this state by a dealer.
Okla. Stat. tit. 68, § 450.3