Payment: Unless direct billing has been established, Group will pay the estimated amount of the Master Account as shown on the deposit schedule. Group will advise Hotel of its expected method of payment of the Master Account at least 30 days in advance of February 12th, 2015. If Group will pay using a credit card honored by Hotel, a valid credit card must be provided to Hotel no later than February 12th, 2015 all Master Account charges will be charged to such credit card at departure. Any amounts not paid at departure will accrue interest at 1½% per month from the date of departure. Upon application and review by Hotel, Hotel may elect to extend direct billing privileges to Group. If direct billing has been established, payment of all undisputed amounts is due within 20 days of Group’s receipt of invoice from Hotel, and if not paid within 20 days will accrue interest at 1½ % per month from date of departure. Group must notify Hotel of any disputes within 5 business days of Group’s receipt of invoice from Hotel or disputes will be considered waived. If Hotel determines after establishing direct billing or a deposit schedule that Group’s credit status has changed negatively, Hotel may require payment of all estimated Master Account charges no later than 20 days before February 12th, 2015.