When securing building materials, how many knots are acceptable in the tiedown(s)?

Requirements for Securement System:
In proper working order with no damaged or weakened components that affect their performance or reduce their working load limit.
No knots.
Attached and secured in a manner that prevents them from coming loose during transit.
Able to be tightened by a driver of an in-transit vehicle.
Located inboard of rub rails whenever practicable.
Edge protection must be used when a tiedown would be subject to abrasion or cutting.