(a) Except for the public member and the building contractor member, each appointed advisory board member must be experienced in the design, installation, construction, maintenance, service, repair, or modification of equipment used for environmental air conditioning, commercial refrigeration, or process cooling or heating. Other than the public member, of the appointed members:
(1) one must be an official of a municipality with a population of more than 250,000;
(2) one must be an official of a municipality with a population of not more than 250,000;
(3) five must be full-time licensed air conditioning and refrigeration contractors, as follows:
(A) one member who holds a Class A license and practices in a municipality with a population of more than 250,000;
(B) one member who holds a Class B license and practices in a municipality with a population of more than 250,000;
(C) one member who holds a Class A license and practices in a municipality with a population of more than 25,000 but not more than 250,000;
(D) one member who holds a Class B license and practices in a municipality with a population of not more than 25,000; and
(E) one member who holds a license of any classification under this chapter, is principally engaged in air conditioning and refrigeration contracting, and practices in a municipality; and
(4) one must be a building contractor who is principally engaged in home construction and is a member of a statewide building trade association.
(b) At least one advisory board member appointed under Subsection (a)(3) must be an air conditioning and refrigeration contractor who employs organized labor.