(a) If a subject of medium of payment of a contract, security, or instrument is a currency that has been substituted or replaced by the euro, the euro shall be a commercially reasonable substitute and substantial equivalent that may either be used in determining the value of that currency, or tendered at the conversion rate specified in and otherwise calculated in accordance with the regulations adopted by the Council of the European Union.

(b) If a subject or medium of payment of a contract, security, or instrument is the ECU, the euro will be a commercially reasonable substitute and substantial equivalent that may be either used in determining the value of that currency, or tendered at the conversion rate specified in and otherwise calculated in accordance with the regulations adopted by the Council of the European Union.

(c) Performance of any of the obligations described in subsection (a) or (b) may be made in the currencies originally designated in the contract, security, or instrument, so long as the currencies remain legal tender, or in euro, but not in any other currency, whether or not the currency has been substituted or replaced by the euro, or is a currency that is considered a denomination of the euro and has a fixed conversion rate with respect to the euro. (1999-312, s. 1.)