Amends the National Energy Conservation Policy Act (NECPA) to: (1) mandate that each Federal agency undertake a comprehensive review of practicable measures for increasing energy and water conservation, and for using renewable energy sources; (2) allow as an approved benefit ancillary to an energy savings or performance contract those savings resulting from reduced operation and maintenance costs at replacement facilities; and (3) repeal the termination dates governing the authority to enter into energy savings performance contracts (thus extending such authority indefinitely).