Common use of XXXX CANADA Clause in Contracts

XXXX CANADA. I/We have the authority to bind the Corporation I have authority to bind the Corporation Name: Name: Title: Chief Financial Officer Title: Sales Director, MDU and Greenfields Date: February 26, 2009 Date: February 26, 2009 This Addendum is made as of the date last signed by both parties below (the “Effective Date”).

XXXX CANADA. I/We have the authority to bind the Corporation I have authority to bind the Corporation Name: Name: Title: Chief Financial Officer President Title: Sales Director, MDU and Greenfields Field Sales Date: February 26Aug 9, 2009 2012 Date: February 26Aug 9, 2009 This Addendum is made as of the date last signed by both parties below (the “Effective Date”).2012