Where does detailed, specific guidance for handling a disruptive passenger incident typically come from, according to the manual?

49 CFR 383.117(a)(3), proper responses to emergency situations such as fires and unruly passengers; AAMVA CDL Manual Section 4.3.2 (p.4-3)

Recognizing that specific disruptive-passenger procedures vary by carrier, on top of the general safety principle the manual lays out, helps a driver understand why employer-specific training still matters even after passing the knowledge test.