Sec. 602.201. LICENSE REQUIRED; SPECIALTY LICENSE. (a) A person may not practice medical physics without a license. (b) A medical physicist may not practice the following specialties unless the person holds a license for that specialty: (1) diagnostic radiological physics; (2) medical health physics; (3) medical nuclear physics; or (4) therapeutic radiological physics. Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. Sept. 1, 1999.