The US Department of Health and Human Services (HHS) Office for Civil Rights (OCR) and the Substance Abuse and Mental Health Services Administration (SAMHSA) issued long awaited updates to the regulations at 42 CFR Part 2 (Part 2) on February 16, 2024. Part 2 is a critical set of rules protecting the privacy of patients receiving substance use disorder (SUD) treatment services and their associated clinical records.