1. Short title This Act may be cited as the Positive Train Control Implementation and Financing Act of 2018 . 2. Prohibition on further extension of requirement to implement positive train control Section 20157 of title 49, United States Code, is amended— (1) in subsection (a)(2)— (A) by striking subparagraph (B); (B) by redesignating subparagraph (C) and (D) as subparagraphs (B) and (C), respectively; (C) in subparagraph (B) (as redesignated by subparagraph (B)) by striking , including any alternative schedule and sequence, as applicable, ; and (D) in subparagraph (C) (as redesignated by subparagraph (B)) by striking including any amendments or any alternative schedule and sequence approved by the Secretary under paragraph (3) and inserting including any amendments to such plan ; (2) by striking subsection (a)(3); (3) in subsection (c)(1)(C) by striking or subsection (a)(2)(B) ; (4) in subsection (c)(2) by striking or any alternative schedule and sequence approved by the Secretary ; (5) in subsection (e)— (A) in paragraph (2) by inserting and at the end; (B) in paragraph (3) by striking subsection (a)(2)(C); and and inserting subsection (a)(2)(B). ; and (C) by striking paragraph (4)