When is a cargo lashing strap considered discarded and illegal for use (Ablegereife)?

1. Whenever surface dirt makes the webbing look darker, even if inspection shows no damage
2. At a fixed age printed by the vehicle operator, regardless of condition and manufacturer instructions
3. When inspection finds cuts, tears, damaged stitching, heat or chemical damage, deformed fittings, or a missing or illegible identification label needed to confirm the strap's rating
4. Only after the strap has broken during a journey