New Mexico Statutes Chapter 66. Motor Vehicles § 66-7-408. Trailers and towed vehicles

A. When one vehicle is towing another the drawbar or other connection shall be of sufficient strength to pull all weight towed thereby. When a combination of vehicles are engaged in transporting poles, pipe, machinery or other objects of structural nature which cannot readily be dismembered, the load shall be distributed so as to equalize the weights on the axle of each vehicle insofar as possible.

B. When one vehicle is towing another and the connection consists of a chain, rope or cable, there shall be displayed upon such connection a white flag or cloth not less than twelve inches square.