CER TIFIC A TE OF THE UNDER WRITERS Date: June 20, 2008 T o the best of our knowledge, information and belief, this prospectus constitutes full, true and plain disclosure of all material facts relating to the securities offered by this prospectus as required by the securities legislation of each province and territory of Canada. CIBC W ORLD M ARKETS I NC . RBC D OMINION S ECURITIES I NC . By: (Signed) R ICK M C C REARY By: (Signed) M AX W EIS N ATIONAL B ANK F INANCIAL I NC . By: (Signed) R IKO G AUDREAULT GMP S ECURITIES L.P. By: (Signed) M ARK W ELLINGS D ESJARDINS S ECURITIES I NC . By: (Signed) P IERRE C OLAS C-3