Md. Code, Health - General § 24–504

Except as provided in § 24–505 of this subtitle, beginning on February 1, 2008, a person may not smoke or vape in:

(1) An indoor area open to the public;

(2) An indoor place in which meetings are open to the public in accordance with Title 3 of the General Provisions Article;

(3) A government–owned or government–operated means of mass transportation including buses, vans, trains, taxicabs, and limousines; or

(4) An indoor place of employment.