General industry with zoned areas
Pharmaceutical, food, grain, water treatment and battery and metals plants all carry dust or solvent zones, and almost none of them describe themselves as a hazardous area buyer. This is the segment that no list vendor sells because no register defines it.
Who signs: plant engineering manager, maintenance lead, safety officer, and at the smaller sites the general manager.
Not separately enumerated
the zoned area layer inside general industry does not surface in any public register, so it has to be identified plant by plant rather than bought as a list