Maryland Health - General Section 24-501
§ 24-501.
  (a)   In this subtitle the following words have the meanings indicated.
  (b)   "Public area" means a room or a portion of a room or other area to which the public has ready access.
  (c)   "Retail store" means any establishment employing 20 or more full-time persons whose primary purpose is to sell to consumers any goods, wares, food for consumption off the premises, or merchandise.
  (d)   "Smoking" means the act of smoking or carrying a burning:
    (1)   Cigar;
    (2)   Cigarette;
    (3)   Pipe; or
    (4)   Other tobacco product of any kind.
  (e)   "Supervisor" means the person who controls, governs, or directs the activities in a retail store.