When a person has been isolated or quarantined and is restricted thereby to his residence or other building, the Director may place in a conspicuous position on the exterior of the premises where such person is isolated or quarantined a placard having printed on it in large letters the name of the disease and warning all unauthorized persons to remain off the premises. Such placard shall be in both English and Chamorro and in any other languages the Director deems appropriate. No person shall remove, deface or destroy such placard until authorized by the Director. Except as authorized by the Director or by regulation, no person shall enter or leave any premises which has been placarded.