Upon a change of the boundaries of a district becoming effective, a copy of the order of the board of directors ordering such change, certified by the president and secretary of the board, shall be filed for record in the recorder’s office of the county within which the annexed lands are situated, and thereupon the district shall be and remain an irrigation district, as fully and to every intent and purpose, as if the lands which are included in the district by the change of the boundaries as aforesaid, had been included therein at the original organization of the district.