1. Short title This Act may be cited as the Green Bus Act of 2019 . 2. Zero-emission bus requirements (a) In general Chapter 53 of title 49, United States Code, is amended by inserting after section 5312 the following: 5313. Zero-emission bus requirements (a) In general Notwithstanding any other requirements of this chapter, not later than October 1, 2029, any bus purchased or leased with funds provided under this chapter or otherwise provided by the Federal Transit Administration for purposes of providing public transportation shall be a zero-emission bus. (b) Definition of zero-Emission bus In this section, the term zero-emission bus means a bus that produces no carbon or particulate matter. . (b) Conforming amendment The table of sections for chapter 53 of title 49, United States Code, is amended by inserting after the item related to section 5312 the following new item: 5313. Zero-emission bus requirements. . 3. Report on best practices implementing zero-emission bus fleets (a) In general Not later than 1 year after the date of enactment of this Act, the Secretary of Transportation shall compile, and make publicly available, a report containing best practices and lessons learned by transit agencies and States that have implemented or are in the process of implementing zero-emission bus fleets. (b) Consultation In compiling the report, the Secretary shall consult with transit agencies, States, zero-emission bus manufacturers, and other stakeholders that the Secretary determines are appropriate. (c) Updates to report The Secretary shall update the report required under subsection (a) annually. 4. Extensions of certain low- or no-emission vehicle programs (a) Additional authorization for certain programs (1) Authorization of appropriations Section 5338(a) of title 49, United States Code, is amended by adding at the end the following: (3) Additional authorization of appropriations There shall be available from the Mass Transit Account of the Highway Trust Fund for fiscal years 2021 through 2029 such funds as are