It is the duty of every owner, possessor or occupier of land within the city, or of every person, or firm or corporation having charge of such land, to cut or cause to be cut down all noxious grass and weeds to prevent the noxious weeds from exceeding a height of six inches. This pertains to the front, side and rear yard as well as empty lots within city limits. Weeds growing on and along fences must be removed as well. Violators will be charged with the removal expenses and are subject to receiving a citation should they fail to remove tall grass.