[Filing certified copy of order including land, with map;

effect.] Upon the entry of an order granting any such petition as aforesaid, a certified copy thereof and a plat of the 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 shall be situated any of the lands of the district; and the district shall be and remain a drainage district as fully and to every intent and purpose as if the lands so included within the district as aforesaid, had been included therein at the time of the original organization of the district; and the district as so changed and all the lands embraced therein shall be liable for all existing obligations and indebtedness of such organized district.