; (B) in clause (ii), by inserting or after this section, ; and (C) by adding at the end the following: (iii) is a critical energy resource facility, ; and (2) by adding at the end the following: (4) Definitions For the purposes of this subsection: (A) Critical energy resource The term critical energy resource means, as determined by the Secretary of Energy, any energy resource— (i) that is essential to the energy sector and energy systems of the United States