Members must select a primary relationship (the "Membership") with either the Marriott Rewards Program or The Ritz-Carlton Rewards Program, and based on a relationship the Member will receive communications from the Rewards Program that they have selected. In addition, Members of each Rewards Program may earn different Membership levels, depending on the nature and frequency of their stays. Members will receive a Membership Number that is transferable between both Rewards Programs, and Members may transfer between Rewards Programs at any time. As described in more detail below, Members may earn Points, the currency of the Rewards Programs, or airline frequent flyer miles ("Miles") with the participating frequent flyer program of their choice, for each eligible stay at a participating property. Participation in the Rewards Program is subject to the Program Rules, rules, regulations, policies and procedures that the Company may, in its discretion, adopt from time to time. The Company may amend the Program Rules at any time without notice. The Company has the sole discretion to interpret and apply the Program Rules.