4.—(1) So far as anything done or treated as done under or for the purposes of any provision of the former licences could have been done under or for the purposes of the corresponding provision of the modified licences, it shall have effect as if done under or for the purposes of the corresponding provision; and any direction, notice, consent, specification, designation or determination or other decision made or having effect under any provision of the former licences shall be treated for all purposes as made and having effect under the corresponding provision.
(2) Where any period of time specified in a provision of the former licences is current immediately before the coming into force of these Regulations, the corresponding provision of the modified licences shall have effect as if that period of time—
(a)ran from the date or event from which it was running immediately before the coming into force of these Regulations, and
(b)expired whenever it would have expired if the former licences had not been modified;
and any rights, liabilities, obligations or requirements dependent on the beginning, duration or end of such a period as mentioned above shall be under the modified licences as they were or would have been under the former licences.