40—Proof of documents by examined or certified copies
Whenever any book, or other document, in the United Kingdom, or in any part of
His Majesty's Dominions outside the Commonwealth and other than the United
Kingdom, is provable (according to the law of England, or of the said part of
His Majesty's Dominions) by means of a copy, any copy thereof or extract
therefrom shall be admissible in evidence if it—
(a) is
proved to be an examined copy or extract; or
(b)
purports to be signed and certified as a true copy or extract by some officer
who shall further certify that he is the officer to whose custody the original
is entrusted.