; (2) an assessment of whether and, if so, how the Department of Transportation uses the data described in paragraph (1) in carrying out its responsibilities; and (3) an assessment of the Department of Transportation public drug and alcohol testing database under section 8103. (c) Recommendations The report under subsection (a) may include recommendations regarding— (1) how the Department of Transportation can best use the data described in subsection (b)(1); (2) any improvements that could be made to the process described in subsection (b)(1); (3) whether and, if so, how the Department of Transportation public drug and alcohol testing database under section 8103 could be made more effective; and (4) such other recommendations as the Comptroller General considers appropriate. 8105. Transportation Workplace Drug and Alcohol Testing Program; addition of fentanyl and other substances (a) Mandatory Guidelines for Federal Workplace Drug Testing Programs (1) In general Not later than 180 days after the date of enactment of this Act, the Secretary of Health and Human Services shall— (A) determine whether a revision of the Mandatory Guidelines for Federal Workplace Drug Testing Programs to expand the opiate category on the list of authorized substance testing to include fentanyl is justified, based on the reliability and cost-effectiveness of available testing