Time is of the essence in the performance of this Contract and the GMP Agreement, and Construction Manager shall commence performance of Construction Services within ten (10) days after receipt from the Owner of the executed GMP Agreement and signed Purchase Order and Notice to Proceed, and shall complete the Project within the time frames specified in the GMP Agreement, or as extended by signed amendment or Change Order. The Authority and Contractor hereby agree to enter into this Contract for Rapid Response Construction Services to be performed on a Task Order basis to the lowest responsive, responsible bidder.