Del. Code tit. 16 § 1420
When any authority shall have paid or provided for the payment of the principal of and the interest on all bonds secured by a pledge of any of the revenues of a project, it may (subject to any agreements concerning the operation or disposition of such project) grant and convey such project to the municipality or municipalities composing the authority. When any authority shall have paid or made provisions for the payment of the principal of and the interest on all bonds issued by it and settled all other claims against it, it may terminate its existence. A certificate, requesting the termination of the existence of the authority, signed by the proper officers of the authority and stating that the principal of and the interest on all bonds issued by it have been paid or that provisions for such payment have been made and that all claims against the authority have been settled shall be filed with the Secretary of State. If the certificate is approved by the municipality or municipalities composing the authority by ordinance or resolution, the Secretary of State shall note the termination of existence on the records of the Secretary of State and issue its certificate of approval to the board and thereupon the authority shall cease to exist.
16 Del. C. § 1420