Law question regarding firing a firefighter for not meeting minimum fitness testing?

Tawney had been working as a forest firefighter for two years. Tawney was one of the only women in her unit, but that did not stop her from winning the Firefighter of the Year badge for her region. Two weeks later, Tawney was notified that she had not ped one of the modules on a newly imposed province-wide fitness test and that, as a result, she would be dismissed. This module of the test required firefighters to run a 2.5 km course of uphill terrain in 11 minutes or under. Tawney had taken 11 minutes and 49 seconds. Because of her excellent record of service, she was given a severance package in excess of what was owed to her by law. Does Tawney have grounds for a complaint?