(w) Provision of other services, which may reasonably be requested by the Principal
(x) The GSA shall bear the costs of all services covered by this Article, except those expressly excluded and indicated as being reimbursable to the GSA, in which instance prior approval is to be obtained before making such expenditure and supporting vouchers and invoices are to be furnished for reimbursement.
(y) Reservations for passenger transport on the scheduled services of 7C in accordance with the Principal procedures. The GSA agrees not to make duplicate bookings, and in the event of changes or cancellations to reservations, the GSA will notify the Principal immediately of such alterations.