Final answer:
The regulation number for food premises in the HPPA is Regulation 493/17, formerly known as Regulation 562, which establishes food safety standards for food premises in Ontario, Canada.
Step-by-step explanation:
The regulation number for food premises in the Health Protection and Promotion Act (HPPA) is Regulation 493/17, which is formerly known as Regulation 562. This regulation sets out the minimum standards for food safety that must be followed by food premises in Ontario, Canada. It's important to note that regulations can be updated or renumbered, so it's always best to check the latest information from government resources.