The Department of Veterans Affairs, NCO 21, requires residential treatment services for San Francisco VA Health Care System beneficiaries. The solicitation is unrestricted, with NAICS 623220 (Residential Mental Health and Substance Abuse Facilities) and a $19 million size standard. The Government intends to award a single Indefinite Delivery Indefinite Quantity contract. Offerors must carefully follow FAR 52.212-1 and VAAR 852.273-73, as failure to do so may eliminate their response from consideration. Contractors must be registered in SAM.gov with the purpose of registration reflecting “All Awards,” and must monitor SAM.gov and acknowledge all amendments.