See, I interpret section b) to mean that whilst assistance animals by law are permitted in any food business, they are only allowed access to standard customer areas ie. Jane Smith can't take her guide dog in to the kitchen. I wouldn't consider it to have any bearing whatsoever on other non-assistance animals. Point a) rules that live animals can't enter food handling areas but no mention of general premises. If there is a ban it must stem from other regulations, be they state gov or council....my money is on particular councils.