Agreement to Amend Sample Contracts

AGREEMENT TO AMEND
Agreement to Amend • January 23rd, 2009 • HudBay Minerals Inc. • Metal mining • British Columbia

Each of the undersigned, hereby acknowledge and agree that the Plan of Arrangement attached hereto as Appendix “A” shall be the Plan of Arrangement for the purposes of the Arrangement Agreement dated June 23, 2008 among the undersigned (the “Arrangement Agreement”) and shall be the Plan of Arrangement submitted to the Court.