; and (2) by adding at the end the following: (6) Sunset The Advisory Committee established under this subsection ceases to exist effective January 1, 2019. . (c) Northeast Corridor Safety Committee Section 24905(e) of title 49, United States Code, is amended by striking paragraphs (2) and (3) and inserting the following: (2) Functions The Committee shall function as a working group of the Railroad Safety Advisory Committee. (3) Sunset The Committee established under this subsection ceases to exist on the date that the Secretary, in consultation with the Administrator of the Federal Railroad Administration, determines positive train control, as required by section 20157, is fully implemented along the Northeast Corridor. . (d) National Rail Cooperative Research Program Oversight Committee Section 24910(c) of title 49, United States Code, is amended by adding at the end the following: (3) Sunset The advisory board established under this subsection ceases to exist effective January 1, 2019. .