Del. Code tit. 7, § 6120

If the lessee, as disclosed by information submitted with his or her bid, proposes to drill 1 or more wells from filled lands, whether contiguous or noncontiguous to the littoral lands or uplands, or from any pier or from platforms or other fixed or floating structures to be constructed for such purpose, and if permission from any federal or state agency is legally required in order to construct any such filled lands or structures, the lessee shall be allowed a reasonable time following the execution of the lease within which to secure the necessary permission from such federal and state agencies as shall be legally required, and, upon the securing of such permission, a further reasonable time, determined with regard to the nature of the filled lands or structure or structures to be constructed, within which to commence operations for the drilling of such well or wells, and if necessary, the drilling term provided for in § 6121 of this title shall be extended by the Secretary to the date to which the time to commence operations for the drilling of such well or wells has been extended.