17. Proof of instruments creating powers of attorney.

The contents of an instrument creating a power of attorney may be proved1 by means of a copy which is a reproduction of the original made with a photographic or other device for reproducing documents in facsimile2, and contains a certificate or certificates signed by the donor of the power or by a solicitor, authorised person3 or stockbroker4 that the copy is a true and complete copy of the original5, and, where the original consists of two or more pages, that each page is a true and complete copy of the corresponding page of the original