What the classification says
The general state is so poor due to rust or dirt that this may lead to contamination of the payload.
How to spot it
Flaking rust inside the box, or caked dirt on the base boards.
Effect on the pallet's class
Bad general condition. See Not fit for use for the full criteria.
Repair
Licensed repair or recycling.
If no licensed repairer is practical, sell sound timber as non-EPAL wood or send the pallets for recycling.