If we look at the timings of the turnarounds, the Valcartier brigade will be deployed this spring, in March and April, and will come back six months afterward, which means next October. Therefore, this deployment is not at all connected with the Afghani elections, which will be held in August. The unit currently on the ground will certainly not be kept there until August; this would be an extension of more than four months.
If an event were to occur near the end of the mission we might look into the possibility of extending the mission by one week or two. At present, we do not need to have both brigades on the ground at the same time. The timings do not allow for any extension that would be due to the elections.