The professional regulation department fulfils two roles at CGA Ontario. It provides advice and opinions for CGAs, students or members of the public who have questions or concerns about the interpretation of the Code of Ethical Principles and Rules of Professional Conduct. The department also handles professional misconduct and competence complaints forwarded to CGA Ontario by the public or members and students.

The department is composed of legal counsel and an executive assistant, both of whom assist in the processing of discipline complaints as they are filed with CGA Ontario. Legal counsel acts as an adviser to the discipline committee and attends all committee meetings where he or she provides legal and procedural advice to committee members about the complaints they are reviewing.