We may make changes to these Terms from time to time. When we make changes, we will update these Terms on our website. We will also specify the date of the last update. The changes we may make to these Terms include but are not limited to changing: the requirements relating to Tier Status and the types of Tier Status; the Mission Rewards Member Benefits; the Mission Rewards Credit and Status Points earning rates; the redemption rates for Rewards and the qualifying purchases. For example, we may vary the products or services which can be used to earn Mission Rewards Credit.