Maryland Election Law Section 16-203

      (a)      A person may not willfully disobey the lawful command of an election official at a polling place on election day.

      (b)      A person who violates this section shall be guilty of a misdemeanor and shall be subject to a fine of not less than $10 nor more than $250 or imprisonment for not less than 30 days nor more than 6 months or both.