In section 4(2) of the [1926 c. 11.] Law of Property (Amendment) Act 1926 (which, as varied, provides that where a purchaser has obtained an official certificate of the result of search, any entry which is made in the register after the date of the certificate and before the completion of the purchase, and is not made pursuant to a priority notice entered on the register before the certificate is issued, shall not, if the purchase is completed before the expiration of the fourteenth day after the date of the certificate, affect the purchaser), for the words " before the certificate is issued " there shall be substituted the words " on or before the date of the certificate ".