Maryland Criminal Law Section 10-703
§ 10-703.
  (a)   This section applies to a flag of the United States or of this State, or a flag that is authorized by law of the United States or of this State.
  (b)   For exhibition or display, a person may not place or cause to be placed a word, figure, mark, picture, design, or advertisement of any nature on a flag.
  (c)   A person may not publicly exhibit a flag with a word, figure, mark, picture, design, or advertisement printed, painted, or produced on or attached to the flag.
  (d)   A person may not publicly display for sale, manufacture, or otherwise, or sell, give, or possess for sale or for use as a gift or for any other purpose, an article of merchandise or receptacle on which a flag is produced or attached to advertise, decorate, or mark the merchandise.
  (e)   A person who violates this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $500.