Water Supplies (Exceptional Shortage Orders) Act 1934

3 A notice which is required under this Schedule to be served on any person may be served either :

(a) by delivering it to the person on whom it is to be served; or

(b) by leaving it at the usual or last-known place of abode of that person; or

(c) by sending it in a pre-paid registered letter addressed to that person at his usual or last-known place of abode; or

(d) in the case of an incorporated company or body, by delivering it to the secretary or clerk of the company or body at their registered or principal office or sending it in a pre-paid registered letter addressed to the secretary or clerk of the company or body at that office; or

(e) if it is not practicable after reasonable inquiry to ascertain the name or address of an owner, lessee, or occupier of land on whom it should be served, by addressing it to him by the description of " owner " or " lessee " or " occupier " of the premises (naming them) to which it relates and by delivering it to some person on the premises, or, if there is no person on the premises to whom it can be delivered, by affixing it or a copy of it to some conspicuous part of the premises.