Final answer:
A security guard looking for legislation governing their profession in Ontario would find it in the Private Security and Investigative Service Act, which outlines the framework for regulation, licensing, and standards in the industry.
Step-by-step explanation:
A security guard in Ontario looking for information regarding the legislation governing their profession would find the relevant rules and regulations in the Private Security and Investigative Service Act. The purpose of this Act is to provide a framework for the regulation of private security guards, private investigators, and their agencies. This includes requirements for licensing, training, conduct, and uniforms, among other aspects. It's important for security professionals to be aware of this legislation to ensure compliance and maintain professional standards.