; relating to providing for the performance of certain functions heretofore performed by the President with respect to electric power and natural gas facilities located on the borders of the United States), any other Executive order, or section 301 of title 3, United States Code, shall be necessary for the construction, connection, operation, or maintenance of an oil or natural gas pipeline or electric transmission facility, or any border-crossing facility thereof. (f) Modifications to existing projects No certificate of crossing under subsection (b), or permit described in subsection (e), 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; (2) an oil or natural gas pipeline or electric transmission facility for which a permit described in subsection (e) has been issued; or (3) a border-crossing facility for which a certificate of crossing has previously been issued under subsection (b). (g) Effective date; rulemaking deadlines (1) Effective date Subsections (b) through (f), and the amendments made by those subsections, shall take effect on the date that is 1 year after the date of enactment of this Act. (2) Rulemaking deadlines Each relevant official or agency described in subsection (b)(2)(B) shall— (A) not later than 180 days after the date of enactment of this Act, publish in the Federal Register a notice of proposed rulemaking to carry out the applicable requirements of subsection (b); and (B) not later than 1 year after the date of enactment of this Act, publish in the Federal Register a final rule to carry out the applicable requirements of subsection (b).