A licensee may not use the licensee's license to obtain a permit or other authority to proceed from a governmental entity unless the licensee is:

1. A. Familiar with the design and purpose of the specific heating, ventilation, air conditioning, and refrigeration work to be performed;
2. B. Available to direct and control all journeymen, apprentices, and others providing heating, ventilation, air conditioning, and refrigeration services; and
3. C. Responsible for the work.

Authority: Business Regulation Article, §§9A-205(a)(1), and 9A-302(e) and (f), 9A-310(a)(1)(xii), and 9A-401(c), Annotated Code of Maryland

Effective date: June 19, 1995 (22:12 Md. R. 900)

Regulation .01B amended as an emergency provision effective September 19, 1997 (24:21 Md. R. 1443); emergency status expired March 19, 1998; amended permanently effective May 18, 1998 (25:10 Md. R. 746)

Regulation .03 amended effective November 4, 1996 (23:22 Md. R. 1495)

Regulation .04B amended and C adopted effective July 1, 1996 (23:13 Md. R. 942)

Regulation .04B, C amended as an emergency provision effective June 2, 2000 (27:13 Md. R. 1209); amended permanently effective November 27, 2000 (27:23 Md. R. 2147)

Regulations .05—.08 adopted as an emergency provision effective May 1, 1996 (23:9 Md. R. 668); adopted permanently effective July 29, 1996 (23:15 Md. R. 1088)

Regulation .09 adopted effective June 15, 1998 (25:12 Md. R. 946)

Regulation .10 adopted effective September 6, 1999 (26:18 Md. R. 1375)

Regulation .10C adopted effective February 7, 2000 (27:2 Md. R. 144)

Regulation .11 adopted effective September 6, 1999 (26:18 Md. R. 1375)

Regulation .11C adopted effective June 24, 2002 (29:12 Md. R. 926)

Chapter revised effective May 22, 2017 (44:10 Md. R. 471)

Regulation .04A, B effective December 11, 2025 (52:24 Md. R. 1197)

Regulation .07A amended effective March 4, 2024 (51:4 Md. R. 202)

Regulation .09 amended effective December 31, 2018 (45:26 Md. R. 1241)

Regulation .10 adopted effective December 31, 2018 (45:26 Md. R. 1241)

Regulation .11 adopted effective March 2, 2026 (53:4 Md. R. 184)