Section 605 ILCS 5/10-103(a) When the Department has acquired title to any bridge or part of a bridge and its approaches as provided in this Division, it is authorized to assume jointly with the adjoining state, or a political subdivision of the adjoining state, responsibility for the future maintenance, operation and control of such bridge. However, the Department shall not pay more than one-half of the cost of the future maintenance, operation and control of the entire bridge and its approaches, except that the Department's share may be proportionate to the length of the bridge within Illinois where required for compatibility with the adjoining state's statutes. The Department may contract with the adjoining state or with a political subdivision of the adjoining state for the maintenance, operation and control of the entire bridge and its approaches by the adjoining state or its political subdivision and for the reimbursement by the Department for the share of the cost properly chargeable to the State of Illinois. In such cases, the Department may also contract to maintain, operate and control the entire bridge itself if the contract also provides for reimbursement of the Department by the adjoining state or its political subdivision of the share of the cost properly chargeable to such adjoining state or its political subdivision.(b) Any such contract between the Department and the adjoining state or a political subdivision of the adjoining state entered into under paragraph (a) of this Section shall be for a period not to exceed 50 years and shall be1.renewable annually in the discretion of the Department, and2.subject to an adequate annual appropriation by the General Assembly to fund the proportionate share of the costs of the maintenance, operation and control of the bridge and its approaches properly chargeable to the State of Illinois.