A youth curfew begins Friday at the National Harbor in Prince George’s County, Maryland.

From 5 p.m. to 5 a.m. Fridays and Saturdays, no unaccompanied minor may be or remain at the National Harbor, Prince George’s County police said.

There will be exceptions for the following.

• Minors with a parent or a guardian.
• Minors accompanied by someone over 21 who is authorized by a parent or guardian.
• If minors are on the sidewalk in front of where they or their neighbors live (if the neighbor did not complain to the police)
• If they are coming home, by direct route from a school activity, or an activity of a religious or other association, or place of employment.

Parents, guardians or businesses are subject to a fine up to $250 plus costs.

A similar curfew was implemented around the same time last year.