Not aware of any food hygiene laws that refer to this, but there is a food hygiene accreditation that does. The AIB (American Institute of Bakers) food hygiene standard has a section which relates to glass and brittle plastics. In a previous role, this was one of the standards I was responsible for maintaining, but its been over 4 years since I last dealt with it, so correct me if I don't get it quite right.. Basically :- - glass or brittle plastic must not be positioned above machines, production lines or conveyors carrying product - there must be a register of every piece of glass and brittle plastic in production and storage areas - glass and brittle plastic on the register must be periodically inspection - there must be a breakage policy and procedure with a dedicated vacuum cleaner - light fittings above machines, production lines and conveyors must be unbreakable We fitting fluorescent tubes which were unbreakable. They had a flexible plastic outer which contained any breakage inside. A remember an engineer showing off when he tied a knot in one after he had changed it.