Del. Code tit. 7, § 1126

Anyone who fishes in fresh waters stocked with trout by the Department at locations and during seasons designated by the Department shall purchase a Delaware trout fishing stamp. Such stamp must be in the possession of persons fishing in such waters, either as a gummed paper stamp validated by the signature of the licensee written in ink across the face of said stamp, or in paper or digital form encoded in a manner that validates the stamp holder. Delaware trout fishing stamp holders shall be permitted to take trout during the open season for such fish and in a manner permitted by law from the fresh waters which are stocked with trout by the Department. Any person exempt from purchasing a Delaware fishing license under § 502(e)-(i), § 502(k)-(l), or § 507(d) of this title is also exempt from purchasing a Delaware trout fishing stamp.