The aggravating factors in the Criminal Code are deemed to be aggravating, so it's “shall”. If we look at section 718.2, as Mr. Fortin was pointing out, it says that the court, in imposing a proportional sentence, must increase or decrease the sentence to take into account aggravating and mitigating factors.
It then proceeds to deem certain circumstances that relate either to the offence or to the offender to be aggravating in all circumstances. It shall consider that situation to be an aggravating factor in all circumstances.