Tex. Occupations Code § 266.202

(a) The owner, manager, or employee of a dental laboratory or a dental technician may not perform or aid or abet another person in performing a dental laboratory service unless:

(1) the service was ordered by and any resulting item will be delivered to:

(A) a dentist engaged in the practice of dentistry in this state or in a jurisdiction in which the dentist maintains a dental office and engages in the practice of dentistry; or

(B) an employee of the dentist, if the service is performed for and on behalf of the dentist; and

(2) the dental laboratory receives a prescription or work order for the service in accordance with Section 266.201.

(b) If a dental laboratory receives a prescription or work order for dental laboratory services and refers the work to another laboratory, the referral must be accompanied by a written statement that the prescription or work order is on file with the original laboratory.

(c) A dental laboratory owner or manager shall maintain on the premises of a dental laboratory as a part of the laboratory's records a record of each prescription or work order completed at the dental laboratory until the second anniversary of the date the prescription or work order is furnished. The owner or manager shall also maintain the record in an alphabetized file in a separate place.

(d) The premises of a dental laboratory, the records of a dental laboratory or a dental technician employed by the dental laboratory pertaining to dental prescriptions or work orders, and records relating to the referral of work to a dental technician or the owner or manager of a dental laboratory shall be open and available for inspection by a member, officer, employee, investigator, or agent of the board during regular office hours.