The purpose of this Act is to provide Illinois State government leadership in preserving, restoring, and maintaining the historic resources of the State. It is the purpose of this Act to establish a program whereby State agencies (1) administer the historic resources under their control to foster and enhance their availability to future generations, (2) prepare policies and plans to contribute to the preservation, restoration, and maintenance of State-owned historic resources for the inspiration and benefit of the people, and (3) in consultation with the Director of Natural Resources, institute procedures to ensure that State projects consider the preservation and enhancement of both State owned and non-State owned historic resources.