Del. Code tit. 16 § 1413
Upon the acquisition or construction of any sewerage system under this chapter, the owner of each lot or parcel of land which abuts upon a street or other public way containing a sanitary sewer which is a part of or which is served or may be served by such sewerage system and upon which lot or parcel of land a building shall have been constructed for residential, commercial or industrial use, shall, if so required by the rules and regulations or a resolution of the authority, connect such building with such sanitary sewer and shall cease to use any other method for the disposal of sewage, sewage waste or other polluting matter; provided, however, that the owner of such lot or parcel of land having a method for the disposal of sewage, sewage waste or other polluting matter constructed and operated in accordance with standards prescribed or approved by the Secretary of the Department of Natural Resources and Environmental Control shall not be required to make such connection. All such connections shall be made in accordance with rules and regulations which shall be adopted from time to time by the authority, which rules and regulations may provide for a charge for making any such connection in such reasonable amount as the authority may fix and establish.
16 Del. C. § 1413