FAR and DFARS

Part 12 covers commercial products and services, which is how most straightforward buying is done and the friendliest route in. Part 13 is simplified acquisition, the fast lane for smaller purchases. Part 15 is negotiated procurement, which is where large competitive proposals live. Part 19 is the whole small business and set-aside programme. Part 52 holds the clauses themselves.

Part 2 is definitions, and it is more useful than it sounds. A surprising number of disputes are really disagreements about what a word in the contract means.

DFARS is the Defense Department's supplement to the FAR. It does not replace it, it adds to it, and where they conflict DFARS wins for defence work. Most other agencies have their own supplement too, so a VA solicitation carries VAAR and a NASA one carries NFS.

For defence suppliers the DFARS clauses that bite hardest are the cybersecurity ones around 252.204, which impose real obligations on your own systems rather than on the work you deliver.

A solicitation will often list clause numbers without printing them. Those clauses apply in full. Treating a clause list as boilerplate because the text is not in front of you is the most common way a small contractor agrees to something it has not read.

52.212-4 is the commercial items terms, and its paragraph (c) is the one that says changes must be by written bilateral modification, which is the clause that decides whether extra work you were verbally asked to do ever gets paid for. 52.243 is the changes clause family. 52.219 is the small business set of obligations. If you read four things, read those.