Any person who obstructs the operations of the Fire Authority in connection with extinguishing any fire, or other emergency, or disobeys any lawful command of the fire official or officer of the Fire Authority who may be in charge at such a scene, or any part thereof, or any police officer assisting the Fire Authority, is guilty of a misdemeanor and, upon conviction, may be fined not more than two hundred dollars or imprisoned for not more than thirty days.