159.—(1) An application to the court for a RLNC administration order must be served by delivering the documents as follows—
(a)on the relevant licensee nuclear company at its registered office;
(b)on any other person at that person’s proper address.
(2) A person’s proper address is any which that person has previously notified as the address for service, but if the person has not notified such an address then the documents may be served at that person’s usual or last known address.