A non-refundable deposit of US$1500 per Guest per Trip (except when a different amount is otherwise noted in writing by Operator) and a completed Guest Reservation Form (“Reservation Form”), which includes electronic acceptance of these Terms and Conditions, is required for a Guest to reserve space for each Trip. The balance of the Trip payment price (together with the deposit previously paid, the “Trip Fees”) is due one hundred and twenty (120) days before the Trip Start Date as listed on the Itinerary.