# Business Occupations and Professions (GBO)

## Title 12. Plumbers

### Subtitle 1. Definitions; General Provisions

#### Section 12-103

(a) Except as expressly provided in Sec.Sec. 12-305, 12-307, and 12-503(b) of this title, this title does not apply to Baltimore County.

(b) Except as expressly provided in Sec.Sec. 12-305, 12-307, and 12-503(b) of this title, this title does not apply to areas of Montgomery and Prince George's counties that are under the jurisdiction of the Washington Suburban Sanitary Commission.

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Md. Code Ann., Bus. Occ. & Prof. (as displayed at mgaleg.maryland.gov, October 16, 2026)