EN 620:2002+A1:2010 defines the requirements for fixed belt conveyor safety. This standard is used as the basis for the conveyor audits, the possible non-compliances are photographed and reported with instruction on how to get them to comply with the requirements.
Each fence and shield slows down the access to the maintenance area, but a sick leave slows it even more. There are a good number of practical ways to make the protection so that you can remove the shields in a fast and easy way and to get them back also.