House drains

41 If commissioners fail to signify their approval, &c. within fourteen days, parties may proceed without.
Provided always that if the commissioners fail to signify in writing their approval or disapproval of the level shown on such plan as aforesaid within fourteen days after receiving such notice and plan as aforesaid, the person giving such notice may, notwithstanding anything herein-before contained, proceed to build or rebuild the house therein referred to according to the level shown on such plan, provided that such building or rebuilding be otherwise in accordance with the provisions of this and the special Act.