Maryland Code, CRIMINAL LAW 13-1507
(2) Except as provided in paragraph (3) of this subsection, not more than one paddle wheel license or bingo license may be issued to a single organization in a single calendar week.
(3) A license to operate paddle wheels is valid:
(i) for 24 consecutive hours; or
(ii) if the license is issued for use in conjunction with and at a carnival, during carnival hours, and for the shorter of the duration of the carnival or 14 consecutive days.
(b) A money prize for a paddle wheel game may not exceed $10.
(c) A license to operate a paddle wheel shall also operate as a license to conduct bingo, if authorized by the sheriff on request.