How much steering wheel play (measured at the rim) is considered a vehicle defect during an inspection?

AAMVA CDL Manual Sec. 2.1.3, p.2-2 — a general driver-inspection rule of thumb: more than 10 degrees of play (about 2 inches of movement at the rim of a 20-inch wheel) is a defect to check for. This is not a literal figure from 49 CFR 393.209, which inste

Excessive steering play delays a driver's ability to react and correct the vehicle's path, which is critical at highway speeds. Knowing the specific 10-degree/2-inch benchmark lets a driver correctly judge during a pre-trip inspection whether the steering system needs repair before the vehicle is driven.