When in any State of the United States under the irrigation district laws of said State there has, prior to August 11, 1916, been organized and created or shall thereafter be organized and created any irrigation district for the purpose of irrigating the lands situated within said irrigation district, and in which irrigation district so created or to be created there shall be included any of the public lands of the United States, such public lands so situated in said irrigation district, when subject to entry, and entered lands within said irrigation district, for which no final certi