Okla. Stat. tit. 82, § 688.1
Conservancy districts and master conservancy districts organized under the provisions of the "Conservancy Act of Oklahoma" contained in Chapter 5 of Title 82 of the Oklahoma Statutes, shall be exempt from the payment of sales and use taxes on purchases and use of tangible personal property in this state, and from payment of the vehicle excise tax levied on the transfer or first registration of vehicles purchased and used in Oklahoma, and the vehicles of such districts shall be registered each year for a nominal fee of One Dollar ($1.00), after having obtained the proper Oklahoma certificate of title.
Added by Laws 1969, HB 1302, c. 64, § 1, emerg. eff. March 5, 1969.