What are the essential requirements when securing round timber logs (trungje druri) on a dedicated timber transport vehicle?

1. Logs may simply be stacked loose as long as the truck travels below 30 km/h
2. Logs need only be tied with thin sisal rope at the rear overhang
3. Logs must be supported by rigid vertical stanchions (shtiza/mbajtëse metalike), loaded compact without exceeding stanchion height, and secured by at least two certified high-tension tie-down lashings per log section
4. Logs must be submerged in water during transport