A flag of the United States or a State flag that is displayed on State property and purchased with State money must be manufactured in the United States.
Structure Maryland Statutes
Title 7 - Emblems; Designations; Commemorative Days and Months
Section 7-201 - Adoption of State Flag
Section 7-202 - Description of State Flag
Section 7-203 - Ornament for State Flag
Section 7-204 - Display on State House -- Flag of the United States and State Flag
Section 7-205 - Display on State House -- Armed Forces Flags
Section 7-206 - Manufacturing Requirements -- Flag of the United States and State Flag