1. (a) Unless licensed under the provisions of the Act, with a license of the class and endorsement appropriate for the work described or advertised, it is unlawful for any person, partnership, firm, or corporation to display a sign or use any advertising that such person, partnership, firm, or corporation engages in the business of air conditioning and refrigeration contracting.
2. (b) It is unlawful to advertise, bid for jobs, or otherwise imply that a person, partnership, firm, or corporation will perform air conditioning and refrigeration contracting unless licensed with the class and endorsement appropriate for the work, or using a license number that is not assigned to that person, partnership, firm or corporation.
3. (c) Each Class A and Class B air conditioning and refrigeration contractor's license shall expire three years after the date of issuance.
4. (d) A license number that has been relinquished, revoked, or expired without meeting reissuance requirements shall not be reassigned to any licensee. License numbers shall have the following form: Title/Class/Number/Endorsement code--TACLA000000C.
5. (e) Endorsement Codes are as follows: Environmental Air Conditioning--E; Commercial Refrigeration & Process Cooling and Heating--R; Combined Endorsements--C.
6. (f) A Class B licensed contractor may design, install, construct, maintain, service, repair, alter, or modify any unit of 25 tons or less of cooling capacity or 1.5 million Btu/h or less of heating capacity. In a building or a complex of buildings having more than one air conditioning or heating unit, a Class B license holder may work on a combination of units where the combination total is more than 25 tons cooling capacity or more than 1.5 million Btu/h, as long as each complete individual unit has a cooling capacity of 25 tons or less and a heating capacity of 1.5 million Btu/h or less.
7. (g) Any contractor who has a Class B license with either or both endorsements may upgrade either endorsement by passing the Class A examination for that endorsement.
8. (h) A contractor who wishes to have endorsements of different classes must have a separate license for each endorsement. The licenses will not have concurrent expiration dates unless both are issued on the same date.
9. (i) A contractor may have only one endorsement per license when he has two licenses. Both licenses must have the same business affiliation and permanent and business addresses.
10. (j) The insurance requirement for separate licenses can be met with a single policy with limits at least as high as those required for a Class A license. A waiver of insurance for one license automatically applies to both licenses.
11. (k) Any violation of the law or the rules and regulations resulting in disciplinary action for one license may result in disciplinary action for the other license.

Source Note:The provisions of this §75.22 adopted to be effective January 28, 1993, 18 TexReg 301; amended to be effective November 16, 1993, 18 TexReg 7927; amended to be effective January 10, 1997, 22 TexReg 737; amended to be effective January 1, 1998, 22 TexReg 12757.