Upon the allowance of such petition and in case no protest has been filed with the board within thirty days after the entry of said order as aforesaid, a certified copy of the order of the board of directors making such change and a plat of such district showing such change, certified by the president and secretary, shall be filed for record in the office of the county clerk of each county in which are situate any of the lands of the district, and the district shall remain an irrigation district as fully to all intents and purposes as if the lands which are excluded by the change aforesaid, had not been excluded therefrom.