Texas Labor Code - LAB § 406.122. Status as Employee

(a) For purposes of workers' compensation insurance coverage, a person who performs work or provides a service for a general contractor or motor carrier who is an employer under this subtitle is an employee of that general contractor or motor carrier, unless the person is:

(b) A subcontractor and the subcontractor's employees are not employees of the general contractor for purposes of this subtitle if the subcontractor:

(c) An owner operator and the owner operator's employees are not employees of a motor carrier for the purposes of this subtitle if the owner operator has entered into a written agreement with the motor carrier that evidences a relationship in which the owner operator assumes the responsibilities of an employer for the performance of work.