; addition of fentanyl (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 determine whether a revision of the Mandatory Guidelines for Federal Workplace Drug Testing Programs to expand the opiate category on the list of authorized drug testing to include fentanyl is justified, based on the reliability and cost-effectiveness of available testing. (2) Revision of guidelines If the expansion of the opiate category is determined to be justified under paragraph (1), the Secretary of Health and Human Services shall publish in the Federal Register, not later than 1 year after the date of the determination under that paragraph, a final notice of the revision of the Mandatory Guidelines for Federal Workplace Drug Testing Programs to expand the opiate category on the list of authorized drug testing to include fentanyl. (b) Department of Transportation drug-Testing panel If the expansion of the opiate category is determined to be justified under subsection (a)(1) and the Secretary of Transportation concurs with that determination, the Secretary of Transportation shall publish in the Federal Register, not later than 18 months after the date the final notice is published under subsection (a)(2), a final rule revising part 40 of title 49, Code of Federal Regulations, to include fentanyl in the Department of Transportation's drug-testing panel, consistent with the Mandatory Guidelines for Federal Workplace Drug Testing Programs as revised by the Secretary of Health and Human Services under subsection (a). (c) Savings provision Nothing in this section may be construed as limiting or otherwise affecting any authority of the Secretary of Health and Human Services or the Secretary of Transportation to expand the list of authorized drug testing to include an additional substance. 6. Report on hair testing guidelines Not later than 30 days after the date of enactment of this Act, and every