5. MODIFICATION OF THIS AGREEMENT<p>I. We reserve the right at our own discretion to modify, add to, change, or remove parts of this Agreement (including the Acceptability Guidelines) at any time. We will notify you of any such modification, addition, change or removal by sending an e-mail to the last e-mail address provided by you, and/or by posting notice of such alteration on PURE, and you hereby agree that this will constitute effective notice of any such alteration.