N.Y. U.C.C. 3-107

Section 3--107. Money.\n (1) An instrument is payable in money if the medium of exchange in\nwhich it is payable is money at the time the instrument is made. An\ninstrument payable in "currency" or "current funds" is payable in money.\n (2) A promise or order to pay a sum stated in a foreign currency is\nfor a sum certain in money and may be satisfied by payment of that\nnumber of dollars which the stated foreign currency will purchase at the\nbuying sight rate for that currency on the day on which the instrument\nis payable, or, if payable on demand, on the day of demand.\n