THIS LETTER OF CREDIT SETS FORTH IN FULL OUR UNDERTAKING, AND SUCH UNDERTAKING SHALL NOT IN ANY WAY BE MODIFIED, AMENDED, AMPLIFIED OR LIMITED BY REFERENCE TO ANY DOCUMENT, INSTRUMENT OR AGREEMENT REFERRED TO HEREIN, EXCEPT FOR ANNEXES 1, 2 AND 3 HERETO AND THE NOTICES REFERRED TO HEREIN; AND ANY SUCH REFERENCE SHALL NOT BE DEEMED TO INCORPORATE HEREIN BY REFERENCE ANY DOCUMENT, INSTRUMENT OR AGREEMENT EXCEPT AS OTHERWISE PROVIDED IN THIS PARAGRAPH 4