The project shall be executed under a Build-Operate-Transfer (BOT) structure for a period of ten (10) years. SECTION IV: PROCUREMENT STRUCTUREThe contract shall be structured as a Public-Private Partnership (PPP) Investment Agreement under a Build-Operate-Transfer (BOT) model, valid for 10 years . At the end of the contract term, all upgraded facilities and operational responsibilities shall revert to the Government of Liberia through the Liberia Airport Authority. Payment shall be made by cashier’s check or direct bank deposit to the designated account of the Liberia Airport Authority. Upon presentation of proof of payment, the Bidding Documents may be collected in person at the Office of the Procurement Unit, Liberia Airport Authority, James Spriggs Payne Airport, Sinkor, Monrovia, Liberia, during normal working hours (Monday to Friday, 9:00 a.m. to 4:00 p.m. local time).