One restriction has nothing to do with the vehicle you tested in. Under § 383.95(g), where a State is notified in accordance with § 383.73(o)(3) that a driver has been issued a medical variance, the State must indicate the existence of that variance on the driver’s CDLIS record and on the license document, using the restriction code V to do it. CDLIS is the Commercial Driver’s License Information System — the record a State posts this kind of information to. A medical variance is an FMCSA authorization to drive despite not meeting a physical qualification standard, and § 6.4 teaches it in full. The code is a pointer, not a description: it says the record carries medical-variance information, and the record is where the detail lives.

The section carries a note with a consequence drivers tend to meet at the worst possible moment. In accordance with the agreement between Canada and the United States, drivers with a medical variance restriction code on their license are restricted from operating a commercial motor vehicle in the other country. A variance that makes domestic work possible therefore closes cross-border work while it is on the card. That is the whole of what the note says — it names those two countries and that reciprocal effect, and nothing here extends it to any other border or to any other restriction code.