The minister indeed has full discretion under the act to apply the factors in section 20 and normally the courts would not review that decision; however, the minister also has to follow the process that is described in the act, including the factors in section 20, the information provided to him under section 19, and so on and so forth. Indeed, a party could take the minister to court if they believed he did not follow the steps he has to follow under the act. That is possible.
Evidence of meeting #58 for Industry, Science and Technology in the 40th Parliament, 3rd session. (The original version is on Parliament’s site, as are the minutes.) The winning word was review.
A recording is available from Parliament.