Okla. Stat. tit. 47, § 951
As used in Sections 951 through 964 of this title:
3. "Tow" or "towing" means the use of a wrecker vehicle to lift, pull, move, haul or otherwise transport any other vehicle by means of:
6. "Wrecker or towing service" means engaging in the business of or performing the act of towing or offering to tow any vehicle, except: