(1) The competent authority may, on application made in accordance with section 175, approve a method of segregation not complying with the ADG code, part 9 for transporting dangerous and incompatible goods, if the authority considers that—
(a) it is impracticable to segregate the goods by a segregation device, or method of segregation, complying with the part; and
(b) the risk involved in using the method to transport the goods is not greater than the risk involved in using a device or method complying with the part to transport the goods.
(2) The competent authority may impose any condition on the approval it considers necessary for the safe transport of dangerous goods.