the sufficiency of electric supply within the United States or would not impede or tend to impede the coordination in the public interest of facilities subject to the jurisdiction of the Secretary. . (c) No Presidential permit required No Presidential permit (or similar permit) shall be required pursuant to any provision of law or Executive order for the construction, connection, operation, or maintenance of an oil or natural gas pipeline or electric transmission facility, or any border-crossing facility thereof. (d) Modifications to existing projects No certificate of crossing under subsection (a), or Presidential permit (or similar permit), shall be required for a modification to— (1) an oil or natural gas pipeline or electric transmission facility that is operating for the import or export of oil or natural gas or the transmission of electricity as of the date of enactment of this Act