(a) Individuals who are licensed under the Texas Occupations Code, Chapter 1301 are exempt from the requirements of this subchapter.     
      (b) Employees of industrial facilities who install or service water treatment equipment at their facilities are exempt from the requirements of this subchapter.     
      (c) Employees of public water systems installing water treatment equipment at their system who hold a Class C license or higher, are exempt from the requirements of this subchapter.     
      (d) Employees of registered operations companies installing water treatment equipment at the facilities for which the operations company has a contract to operate and who hold a Class C license or higher, are exempt from the requirements of this subchapter.     
     Source Note:        The provisions of this §30.279 adopted to be effective December 17, 2001, 26 TexReg 10330; amended to be effective September 29, 2016, 41 TexReg 7489