All orders and decisions made by the fence viewers shall be in writing, signed by at least two of them, and filed with the township clerk. [C97, §2360; C24, 27, 31, 35, 39, § 1836; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §113.8 ] C93, §359A.8