S. 326 would require the Department of Veterans Affairs (VA) to conduct long-term research on the use of medical cannabis to treat veterans with chronic pain and post‑traumatic stress disorder (PTSD). The bill also would authorize VA to conduct clinical trials if the department can meet certain criteria. In addition, the bill would require VA to report to the Congress on research results within 90 days of the end of the long-term study; results of any clinical trials would be reported at least annually for five years should the department conduct them.