Okla. Stat. tit. 47, § 47-12-233: Commercially registered road-service vehicles

A. Flashing yellow and white lights may be used on commercially

registered road-service vehicles when providing road services and

repairs to disabled Class A commercial vehicles and passenger

vehicles.

B. Any commercially registered road-service vehicles may be

equipped with flashing yellow and white lights visible from a

distance of not less than five hundred (500) feet to the rear of the

vehicle. Such lights shall only be used for the purpose of warning

the operators of other vehicles to exercise care in approaching,

overtaking or passing such vehicle. Road-service vehicles shall

bear a sign on each side of the vehicle that indicates the name of

the road-service company and shall be visible from a distance of not

less than two hundred (200) feet.

C. As used in this section, "road-service vehicle" means a

commercially registered vehicle capable of on-site repairs for Class

A commercial vehicles and passenger vehicles.