Pffft, most loads dont fully comply.
So strap everything like its a flat.
Drivers and operators think xl curtains are a license to not strap anything. When in most cases there wrong.
I use to do 27t of beverages, all equal height palletts, form loaded from front to back, anti slip mats, xl curtains in conjunction with 48 alu interlocking side lats meant i only needed two shoring lats on the rear.