EXECUTION COPY THIRD SECURITY CONFIRMATION, AMENDMENT AND SUPPLEMENTAL DEBENTURE AGREEMENT This Third Security Confirmation, Amendment and Supplemental Debenture Agreement (the "AGREEMENT") is made as of August 19, 1997 among Canadian Forest Oil Ltd....Third Security Confirmation, Amendment and Supplemental Debenture Agreement • October 31st, 1997 • Canadian Forest Oil LTD • Crude petroleum & natural gas • Alberta
