35Service of documents
Any notice authorised to be served under section 31 above, or any other document required or authorised to be given, delivered or served by or under any regulations made under or having effect by virtue of this Act may, without prejudice to any provisions in that behalf of any such regulations, be given, delivered or served either—
(a)by delivering it to the person to whom it is to be given or delivered or on whom it is to be served ; or
(b)by leaving it at the usual or last known address of that person; or
(c)by sending it in a prepaid letter addressed to that person at his usual or last known address; or
(d)in the case of an incorporated company or body or the arbitration tribunal, by delivering it to the secretary or clerk of the company, body or tribunal at their registered or principal office or sending it in a prepaid letter addressed to the secretary or clerk of the company, body or tribunal at that office ; or
(e)if it is not practicable after reasonable enquiry to ascertain the name or address of a person to whom it should be given or delivered, or on whom it should be served, as being a person having any interest in premises, by addressing it to him by the description of the person having that interest in the premises (naming them) to which it relates, and delivering it to some responsible person on the premises, or affixing it, or a copy of it, to some conspicuous part of the premises.