Md. Code, Criminal Law § 13–2423

(a) Unless otherwise authorized by the county commissioners, a tip jar licensee may operate a tip jar game only:

(1) during normal business hours; and

(2) on the tip jar licensee’s premises.

(b) A tip jar licensee may award prizes in money or merchandise for a tip jar game.

(c) The agency periodically shall send an agent to inspect the premises of each tip jar licensee to ensure compliance with Part III of this subtitle.