Del. Code tit. 25 § 316
No restriction shall be enforceable with respect to real property which prohibits or limits the ability of a property owner or tenant to display the flag of the United States of America on a pole attached to the exterior of the property's building or structure within the owned or leased property's boundaries or on a flagpole located within the owned or leased property's boundaries, if the flagpole is installed prior to termination of any period of community developer control, provided such flag's measurement does not exceed 3 feet by 5 feet and such flagpole installed by the owner does not exceed 25 feet in height and conforms to all setback requirements. Any such installed flagpole shall not be required to be removed after termination of community developer control.
25 Del. C. § 316