§12A-2-614.

§12A-2-614.
   
   (1) Where without fault of either party the agreed berthing, loading,
   or unloading facilities fail or an agreed type of carrier becomes
   unavailable or the agreed manner of delivery otherwise becomes
   commercially impracticable but a commercially reasonable substitute is
   available, such substitute performance must be tendered and accepted.
   
   (2) If the agreed means or manner of payment fails because of domestic
   or foreign governmental regulation, the seller may withhold or stop
   delivery unless the buyer provides a means or manner of payment which
   is commercially a substantial equivalent. If delivery has already been
   taken, payment by the means or in the manner provided by the
   regulation discharges the buyer's obligation unless the regulation is
   discriminatory, oppressive or predatory.