There is a privative clause under the Conflict of Interest Act, which is found in section 66. The remedy is a judicial review at the Federal Court of Appeal, because we're a section 28 tribunal. However, the grounds are very limited. There's no judicial review on a question of law, fact, or mixed law and fact. For example, If there are procedural issues, that could be a ground for review.
On February 8th, 2018. See this statement in context.