On certain school bus seats, the plastic trim (bezel) where the shoulder seat belt comes out of the seatback may be too hard. Canadian regulations have requirements for anything that is installed in certain areas of the seatback.
Safety Risk
While this plastic trim is doesn't technically meet the requirements of Canadian regulations, it's unlikely to cause an injury.
Corrective Actions
This is not a recall. The company made changes in 2017, and all new seats made after that time have a soft vinyl cover trim for the shoulder seat belt.
Get told about the next recall on your Thomas Built.