How does the CDL manual say cargo should be arranged to help keep a vehicle's center of gravity low and handling safe?

49 CFR 383.111(a)(16); AAMVA CDL Manual (nhcdm.pdf) Section 3.2.3, p. 3-2

How cargo is stacked, not just how much of it there is, directly affects how safely a truck handles in a curve or sudden swerve. Loading heavier items low and lighter items on top keeps the center of gravity down and meaningfully reduces rollover risk.