45(3)When any telegraph message or despatch is signed, addressed or written, or appears on its face to have been signed or addressed or written in whole or in part in figures or any number, word, name, phrase or sentence agreed upon or recognized by the sender and receiver of such message or despatch as meaning between them some other word, number, name, phrase or sentence, or as having any other than the ordinary or apparent meaning of such figure, number or word, such signature, address or writing shall, for the purposes of this and the last preceding two sections, be taken to be the word, number, name, phrase or sentence so agreed upon and recognized between the sender and receiver as aforesaid, and such message or despatch shall for all purposes be treated as though the same had been written, addressed and signed in full, according to the meaning agreed upon or recognized as aforesaid and so transmitted.