On October 12, 2023, the Substance Abuse and Mental Health Services Administration (SAMHSA) announced updates to the Mandatory Guidelines for Federal Workplace Drug Testing Programs using Urine (UrMG) and the Mandatory Guidelines for Federal Workplace Drug Testing Programs using Oral Fluid (OFMG) via the Federal Register. Each document received a number of updates, including updates to how the annual drug testing panel is published, revisions to definitions, information on an authorized biomarker testing panel, updates to collection procedures, revisions to the Medical Review Officer (MRO) process, and more.