A special purpose license to practice medicine across state lines shall be limited exclusively to the practice of medicine as defined by §174.2 of this chapter (relating to Definitions) and limited to the specialty or specialization upon which the license was granted under §174.3(a)(3) of this title (relating to Qualifications for Special Purpose License for Practice of Medicine Across State Lines), and the license holder shall practice medicine in a manner so as to comply with all other statutes and laws governing the practice of medicine in the state of Texas. Unless a person holds a current full license to practice medicine in this state pursuant to Chapter 163 of this title (relating to Licensure) and the provisions of the Medical Practice Act, Chapter 155 (relating to License to Practice Medicine), a person holding a special purpose license shall not be authorized to physically practice medicine in the state of Texas.