No liability shall result to Seller from delay in performance or nonperformance in whole or in part if caused by circumstances reasonably beyond its control, including but not limited to acts of God, fire, flood, war, accident, explosion, breakdowns, or labor trouble; embargoes or other import or export restrictions; shortage or inability to obtain energy, equipment, transportation of product deliverable hereunder, crude petroleum or other feedstock from which such product is derived; or good faith compliance with any regulation, direction or request (whether valid or invalid) made by any governmental authority or person purporting to act therefore. Regardless of the occurrence or non-occurrence of any of the causes as set forth in the paragraph above, if for any reason supplies of any product deliverable hereunder, or of crude petroleum or other feedstock from which such product is derived, from any of Seller’s existing sources are curtailed or cut off or are inadequate to meet Seller’s own requirements and its obligations to its customers, Seller’s obligations hereunder during such period of curtailment, cessation inadequacy shall at its option be reduced to the extent necessary in Seller’s sole judgment to apportion fairly among Seller’s own requirements and its customers (whether under contract or not), such product as received and as may be available in the ordinary and usual course of Sellers’ business from any such existing sources of supply at the location(s) from which deliveries hereunder are normally shipped. Seller shall not be obligated to purchase or otherwise obtain other supplies of such product, crude petroleum or other feedstock from which such product is derived to make up inadequate supplies or to replace the supplies so curtailed or cut off. Seller shall not be obligated to make up deliveries omitted or curtailed hereunder, and any such deficiencies in deliveries shall be canceled with no liability to either party, therefore. All shipment and delivery dates are estimates only.