Maryland Alcoholic Beverages Section 12-110

      (a)      A licensee under the provisions of this article, or any of his employees, may not knowingly sell, barter, furnish, or give any intoxicating beverages to a habitual drunkard, or to a mentally deficient person, or to any person whose parent or parents, guardian, husband, wife, son, daughter, brother, or sister shall have given notice in writing, that such person is of intemperate habits, or of unsound mind, or on account of his or her physical condition and request the licensee in writing, not to sell, barter, furnish or give any intoxicating beverages to him or her; and the word "knowingly", as to habitual drunkards shall be construed to mean such knowledge as a reasonable man would have under ordinary circumstances, from the habits, appearances or personal reputation of such individual. A licensee violating any of the provisions of this section shall be guilty of a misdemeanor and upon conviction shall be fined not exceeding $50.00 for the first offense and for each succeeding offense shall be fined not exceeding $100.00 or imprisoned in the county jail for not more than 30 days, or be fined and imprisoned in the discretion of the court.

      (b)      This section shall apply only to Allegany, Carroll, Charles, Harford, Kent, Montgomery, Queen Anne's and Washington counties. Provided, that in Allegany County and Montgomery County the penalty for a violation shall be a fine not in excess of $1,000, or confinement in the county jail, or house of correction for a period not to exceed 2 years, or fine and imprisonment in the discretion of the court.