Every person using or occupying any building, house, or structure within the City shall be required to collect, separate, and dispose of all garbage, trash, ashes, and sewage as provided in this chapter. It is unlawful for any such person, firm, or corporation to collect, separate, or dispose of garbage, trash, ashes, or sewage in any manner except as is provided in this division. It is unlawful for any person other than the City or its designated agents to collect, transport, or dispose of refuse without written approval of the authority, except for private hauling of items to a dump site.