When loading paper rolls with eyes horizontal, which of the following is NOT a requirement for stacking a second layer?

Requirements for eyes crosswise: secure stacks of paper rolls from front-to-back movement
Do not load paper rolls on a second layer unless the bottom layer extends to the front of the vehicle.
Load paper rolls on higher layers only if all wells in the layer beneath are filled.
Secure the foremost roll in each upper layer (or any roll with an empty well in front of it) against forward movement:
Either by placing it in a well formed by two rolls on the lower row whose diameter is equal to or greater than that of the roll on the upper row.
Or by banding it to other rolls.
Or by blocking it against an eye-vertical blocking roll resting on the floor of the vehicle that is at least 1.5 times taller than the diameter of the roll being blocked.