Del. Code tit. 9, § 9623

In the event any real property in an unincorporated suburban community with road frontage on a private road or street, constructed or reconstructed pursuant to § 131 of Title 17, which road or street is not to be maintained by the State, is conveyed subsequent to such construction or reconstruction and the deed is presented for recordation, the recorder of the county in which the land is located shall not record such deed unless the deed shall contain a statement that such private street or road is not maintained by the State.