At least ten (10) days prior to the date Lessee intends the Contractor to commence construction of the Second Expansion Improvements, Lessee shall submit to Lessor for Lessor's reasonable approval the proposed contract between Lessee and the Contractor for the construction of the Second Expansion Improvements. Such proposed contract shall be complete in all material respects. The contract between Lessee and the Contractor for construction of the Second Expansion Improvements shall be subject to the approval of Lessor; and the Contractor shall not be permitted to start construction of the Second Expansion Improvements until Lessor has approved such contract. Lessor shall use best efforts to approve or reasonably disapprove such proposed contract between Lessee and Contractor within five (5) business days of receipt thereof, provided th.at Lessor shall provide detailed reasons for any reasonable disapproval of such contract.