How do I know if certain past conducts need to be disclosed to the Law Society of Ontario?

It is better to always disclose and address any misconduct. If you omit something, even if in error, it appears that you may have deliberately misled the Law Society of Ontario. You may need to address more than the past conduct and explain why you answered questions in your application incorrectly. Sometimes the Law Society takes your failure to disclose more seriously than your past misconduct.