1158. Consideration consisting of foreign currency.

Where an instrument is chargeable with ad valorem stamp duty in respect of any money in any foreign or colonial currency1, the duty is, in general, to be calculated on the value, at the date of the instrument, of the money in British currency according to the current rate of exchange2. If an instrument contains a statement of the current rate of exchange and is stamped accordingly, it is, as regards the subject matter of the statement, deemed duly stamped unless or until it is shown that the statement is untrue and that the instrument is in fact insufficiently