Section 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. 9/1/1999.