SCHEDULE 1 The uniform Law on the international sale of goods
Chapter IV.—Obligations of the buyer

B.—Place and date of payment
2 Where, in consequence of a change in the place of business or habitual residence of the seller subsequent to the conclusion of the contract, the expenses incidental to payment are increased, such increase shall be borne by the seller.
Article 60
Where the parties have agreed upon a date for the payment of the price or where such date is fixed by usage, the buyer shall, without the need for any other formality, pay the price at that date.