Final answer:
The guidelines for the scope of inspection and certification of boilers and pressure vessels by an owner-user versus by ABSA are set by the regulatory body and detailed in their specific codes of practice or appendices relevant to the jurisdiction.
Step-by-step explanation:
The scope of inspection and certification of repairs and alterations of boilers and pressure vessels that can be done by an owner-user and what must be inspected and certified by the ABSA (Alberta Boilers Safety Association) is detailed in a specific appendices or regulations relevant to the jurisdiction in which the boilers and pressure vessels are operated. These regulations are typically found within the published guidelines or codes of practice provided by the authoritative body; for Alberta, Canada, pertinent information would be in the ABSA guidelines and acts, such as the Pressure Equipment Safety Regulation or the Pressure Equipment Repair and Alteration Requirements. It is essential that the owner-users and inspectors refer to the latest and most appropriate code relevant to their jurisdiction and their specific equipment.