Tex. Transp. Code § 622.041
(a) A person may operate over a highway or road of this state a vehicle or combination of vehicles that is used exclusively for transporting poles, piling, or unrefined timber from the point of origin of the timber (the forest where the timber is felled) to a wood processing mill if:
Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.
Amended by Acts 2001, 77th Leg., ch. 941, Sec. 34, eff. Sept. 1, 2001.