Texas Transportation Code - TRANSP § 521.030. Reciprocal License

(a) A nonresident who is 18 years of age or older and who has in the person's possession a license issued to the person by the person's state or country of residence that is similar to a Class A or Class B driver's license issued under this chapter is not required to hold a Class A or Class B driver's license issued under this chapter if that state or country of residence recognizes such a license issued by this state and exempts the holder from securing a license issued by the state or foreign country.

(b) A nonresident who is 16 years of age or older and who has in the person's possession a driver's license issued to the person by the person's state or Canadian province of residence may operate a type of motor vehicle that is permitted to be operated with a Class C or Class M driver's license in this state if the license held by the nonresident permits operation of that type of vehicle in the person's state or province of residence.