Synopsis As Introduced Amends the Illinois Procurement Code. Provides for executive agencies, the Department of Central Management Services, and the Capital Development Board to enter into guaranteed energy savings contracts. Requires the agencies to enter into a request for proposals before entering into a guaranteed energy savings contract; sets forth requirements for the request for proposals. Sets forth provisions concerning the evaluation of proposals. Requires guaranteed energy savings contracts to result in energy or operational cost savings within 20 years. Requires contractors to reimburse the State for any shortfall of guaranteed energy savings projected in the contract. Sets forth other requirements, and provides that certain State laws apply to any contracts entered into under the provisions. Provides that no provision shall be interpreted to require the implementation of energy conservation measures that conflict with respect to any property eligible for, nominated to, or entered on the National Register of Historic Places or the Illinois Register of Historic Places. Removes provisions allowing State purchasing officers to enter into energy conservation program contracts and the chief procurement officer to promulgate rules for entering into energy conservation program contracts.