5(1)Where this paragraph applies, the Secretary of State may by order direct that a statutory undertaker is relieved from the fulfilment of an obligation either—
(a)absolutely, or
(b)to the extent specified in the order.
(2)This paragraph applies where, on the representation of a person carrying on a statutory undertaking, the Secretary of State is satisfied that, as a result of the making of an order under section 39 or 41, it is impracticable for the person to fulfil an obligation incurred in connection with the carrying on of the undertaking.