A Part 2 Program is a federally assisted: (i) individual or entity other than a general medical facility who holds itself out as providing, and provides, substance use disorder (SUD) diagnosis, treatment, or referral for treatment; (ii) an identified unit within a general medical facility that holds itself out as providing, and provides, SUD diagnosis, treatment, or referral for treatment; or, (iii) medical personnel or staff in a general medical facility whose primary function is provision of SUD diagnosis, treatment, or referral for treatment, and who are identified as such providers.