Md. Code, Criminal Law § 13–1505

(a) A members-only instant bingo license is valid for 3 months.

(b) The sheriff may not issue to a single organization in 1 calendar year more than four licenses for members-only instant bingo.

(c) A money prize for a members–only instant bingo game may not exceed $500.

(d) A members-only instant bingo game may be sold and played only at the location listed on the license.