If the Tenant requires air-conditioning to be supplied at the Leased Premises outside the specified hours in Clause 9.2 or on Saturday, Sunday or any national holiday in Bangkok, the Owner shall provide such air conditioning services to the Tenant provided that the Tenant has notified the Owner of its requirement before 5.00 p.m. on the business day prior to the date on which the air-conditioning is required and upon payment of the charges specified from time to time in the Service Agreement.