Which combination of emergency warning devices satisfies the federal requirement and the AAMVA Vehicle Inspection Supplement checklist used for tank vehicle inspections?

49 CFR 393.95(f) (triangles or fuses for stopped-vehicle warning); AAMVA CDL Manual Vehicle Inspection Supplement, Section 11M.1.1 (adds the three-liquid-burning-flares alternative, which appears in the AAMVA checklist but not in the current federal text)

Reflective triangles and flares or fuses are what warn oncoming traffic if a tank vehicle breaks down or is involved in an incident on the roadway. Carrying the wrong quantity can leave a driver unable to properly protect a disabled vehicle, which is both a safety hazard and an inspection failure point.