This Equity Commitment Letter may not be amended or otherwise modified without the prior written consent of Par and Piceance. Together with the Agreement and the Definitive Documents, this Equity Commitment Letter constitutes the sole agreement, and supersedes all prior agreements, understandings and statements, written or oral, between Par and Piceance with respect to the transactions contemplated hereby. Each of the parties acknowledges that each party and its respective counsel have reviewed this Equity Commitment Letter and that any rule of construction to the effect that any ambiguities are to be resolved against the drafting party shall not be employed in the interpretation of this Equity Commitment Letter.