; and (ii) projects in which the use of plastic waste has been applied; (B) assess the economic benefits, if any, including employment opportunities, to municipalities and States in investing in innovative reuse of plastic waste in infrastructure; and (C) if the National Academies consider uses described in that paragraph to be advisable, make recommendations with respect to what Federal testing standards and other barriers may need to be addressed to enable those uses, including with respect to ensuring human health and safety. (b) Report required Not later than 2 years after the date of enactment of this Act, the Secretary shall submit to Congress a report on the study conducted under subsection (a). (c) Grant program (1) In general If the National Academies consider the innovative uses of plastic waste described in subsection (a)(1) to be advisable, and the Secretary agrees, the Secretary shall establish a grant program to encourage those uses. (2) Demonstration projects If the Secretary establishes a grant program under paragraph (1), the Secretary shall carry out the grant program by selecting, through a competitive process, not more than 5 projects to demonstrate the uses described in subsection (a)(1), each of which shall be located in a different region of the United States. (3) Report Not later than 180 days after the date on which the last demonstration project, if any, is completed under paragraph (2), the Secretary shall submit to Congress a report summarizing the results of the demonstration projects, including— (A) the total quantity of plastic waste redirected from the waste stream into infrastructure; (B) the durability of the infrastructure constructed with plastic waste