In plain terms. DOSAR is the Department of State's supplement to the FAR, adding State-specific acquisition rules.
Who it applies to. Contractors serving the Department of State, including overseas work.
What it requires. Comply with the FAR, then DOSAR additions. State Department work can involve sensitive diplomatic and personal information and overseas considerations, so expect related security and handling requirements.
Why it matters. Diplomatic and overseas contexts add sensitivity and risk to information handling on State contracts.
Citation. DOSAR, the Department of State Acquisition Regulation supplement to the Federal Acquisition Regulation (FAR), codified in the FAR System at Title 48 of the C.F.R.