; and (B) for the treatment of veterans for diseases and disorders such as post-traumatic stress disorder. (2) Interagency coordination The Secretary shall coordinate and collaborate with other relevant Federal agencies to support and facilitate clinical research under paragraph (1). (3) Report Not later than two years after the date of the enactment of this Act, the Secretary shall submit to Congress a report on the ongoing clinical research supported by the Secretary under paragraph (1), which shall include such recommendations for legislative or administrative action as the Secretary considers appropriate to continue to support the management of pain and the treatment of diseases and disorders of veterans. (b) Study on use by veterans of State medical marijuana programs (1) In general Not later than two years after the date of the enactment of this Act, the Secretary shall conduct a study on the relationship between treatment programs involving medical marijuana that are approved by States, the access of veterans to such programs, and a reduction in opioid use and misuse among veterans. (2) Report Not later than 180 days after the date on which the study required under paragraph (1) is completed, the Secretary shall submit to Congress a report on the study, which shall include such recommendations for legislative or administrative action as the Secretary considers appropriate. (c) Veteran defined In this section, the term veteran has the meaning given that term in section 101 of title 38, United States Code. (d) Authorization of appropriations There are authorized to be appropriated to the Secretary of Veterans Affairs such sums as may be necessary to carry out this section.