Authority: Business Occupations and Professions Article, §§12-205 and 12-207, Annotated Code of Maryland

Effective date:

COMAR 09.20.01—09.20.25 repealed and new Regulations .01 and .02 adopted under a new chapter, State Plumbing Code, effective October 20, 1997 (24:21 Md. R. 1448)

Regulation .01B amended effective July 23, 2001 (28:14 Md. R. 1321); May 9, 2005 (32:9 Md. R 848); May 18, 2009 (36:10 Md. R. 716); May 13, 2013 (40:9 Md. R. 789); January 2, 2017 (43:26 Md. R. 1444)

Regulation .02 amended effective July 23, 2001 (28:14 Md. R. 1321); May 9, 2005 (32:9 Md. R. 848); May 18, 2009 (36:10 Md. R. 716); May 13, 2013 (40:9 Md. R. 789); January 2, 2017 (43:26 Md. R. 1444)

Regulation .02G, H amended effective January 29, 2000 (27:1 Md. R. 75)

Regulation .02I amended effective May 12, 2003 (30:9 Md. R. 614)

Regulation .03 adopted as an emergency provision effective January 1, 2012 (39:2 Md. R. 139); emergency extended at 39:13 Md. R. 785; adopted permanently effective February 4, 2013 (40:2 Md. R. 72)

Regulation .03E amended effective January 2, 2017 (43:26 Md. R. 1444)

Regulation .04 adopted effective May 13, 2013 (40:9 Md. R. 789)

Regulation .04 amended effective January 2, 2017 (43:26 Md. R. 1444)

Regulation .05 adopted effective January 2, 2017 (43:26 Md. R. 1444)

Chapter revised effective December 30, 2019 (46:26 Md. R. 1163)

Regulation .01 amended effective November 24, 2025 (52:23 Md. R. 1138)

Regulations .02.—.04, .06, .07 repealed effective November 24, 2025 (52:23 Md. R. 1138)