While certainly the Harper government wishes to reduce the discretion of justices in almost every scenario, I view subsection 3.1 as an escape valve. This legislation is ideological but it is also strategically drafted. Creating an escape clause to the general rule, while also leaving "the circumstances" undefined and ambiguous was done so that the legislation would survive a challenge.
According to Statistics Canada and the Canadian Institute for Health Information, rural and northern girls are more likely to smoke and drink, have higher rates of suicide, and have poorer mental health made worse by the remoteness of their location. These factors could explain why the mortality rate for rural girls is double the rate for those in urban areas.