Okla. Stat. tit. 47, § 47-12-405.1

safety devices.

A. Every trailer, semitrailer, manufactured home, or towed

motor vehicle shall be equipped with a coupling device which shall

be designed, constructed, and used so that the trailer, semitrailer,

manufactured home, or towed motor vehicle will follow substantially

in the path of the vehicle drawing it without whipping or swerving

from side to side. In addition, every such trailer, semitrailer,

manufactured home, or towed motor vehicle, except a semitrailer

drawn by a truck-tractor type designed to draw or support the front

end of a semitrailer, shall be coupled with:

1. Stay chains or cables to the vehicle by which it is being

drawn, which chains or cable shall be of sufficient size and

strength to prevent parting from the drawing vehicle, should the

regular coupling device break or become otherwise disengaged; or

2. Chains, cables or a safety device which provides strength,

security of attachment and directional stability equal to or greater

than that provided by safety chains and which prevent parting from

the drawing vehicle should the regular coupling device break or

otherwise become disengaged. The safety device shall be designed,

constructed, and installed so that if the coupling device fails or

becomes disconnected the coupling device will not drop to the

ground.

B. Nothing in this section shall be construed as excepting

commercial vehicles subject to the provisions of 49 C.F.R., Subpart

F, Coupling Devices and Towing Methods, from complying with the

provisions thereof.

C. No person shall tow any vehicle by sole use of a chain,

cable, ropes, or any combination thereof.