At least 2007 probably earlier that that. The below link shows the requirements. It does refer to items less than 10000 lbs can also be secured using this and using light truck/car. Problem is leave it to the government to make something simple complex, due to it says "as well as", both sections apply to smaller equipment, not either or. I knew about this for larger machinery, but not until last year when I sold a JD 850 compact tractor did I know it applied to the smaller machinery the way it did. The guy that hauled it for the person who bought it was a landscaper. He had been cited for 3 improper tie downs a few months before. He was hauling his tractor with a loader and box blade. Only 1 chain through a clevis on the back, no chain on the loader or the box blade. He did have 2 chains on the front. When he tried to fight the tickets he was told it only really allowed the use of lighter tie downs.
Driver's Handbook on Cargo Securement - Chapter 10: Heavy Vehicles, Equipment, and Machinery - Federal Motor Carrier Safety Administration