Where a bill of exchange is stipulated to be payable in a currency which is not current at the place of payment, the amount may be paid in the currency of the country, according to its value on the day of maturity. If the debtor is in arrears, the bearer may, at his option, request that the amount of the bill of exchange be paid in the currency of the country according to the rate either on the day of maturity or on the day of payment.
The customs of the place of payment are used to determine the value of the foreign currency. However, the drawer may stipulate that the sum to be paid shall be calculated on the basis of a rate specified in the letter.
The rules set out above do not apply to the case where the drawer has stipulated that payment is to be made in a certain currency indicated by an effective payment clause in a foreign currency.
If the amount of the bill of exchange is indicated in a currency having the same denomination, but a different value, in the country of issue and in that of payment, it is presumed that reference has been made to the currency of the place of payment.