Final answer:
A company must inform the Canadian bureau immediately of any loss or change in welding engineering or supervisory personnel to maintain compliance with safety and quality standards.
Step-by-step explanation:
When a company experiences any loss or change in welding engineering or supervisory personnel, it must inform the Canadian bureau immediately. This is crucial to ensure that the company remains in compliance with any applicable regulatory requirements, which may mandate that such positions are filled by qualified individuals to maintain safety and quality standards. Additionally, prompt notification allows the bureau to update their records and, if necessary, to verify the new personnel's qualifications.