18 Where an instrument of transfer is executed outside Canada in a place other than a place mentioned in section 17 and where no guarantee of the signature on the instrument of transfer can be obtained in accordance with section 14 and the signature is not vouched for or witnessed in accordance with paragraph 16(a), (b) or (c), the Bank may give effect to the instrument of transfer if the signature of the person signing it is certified to have been affixed in the presence of
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