Maryland Statutes
Part IX - Miscellaneous Provisions
Section 8-652 - Flags at Rest Areas, Welcome Centers, and Exhibit Centers

The following flags shall be flown year round at each rest area, welcome center, and exhibit center within interstate and State highway rights-of-way:
        (1)    The flag of the United States;
        (2)    The State flag; and
        (3)    The POW/MIA flag of the National League of Families of American Prisoners and Missing in Southeast Asia.