Electronic surveillance is a little different because it comes under the general warrant provision and doesn't have the same limitation. But a tracking device does have a limitation. Wiretaps are probably the best comparator here. Wiretaps are normally for 60 days, but if the case for which they're sought is a criminal organization offence or a terrorism offence, they can be for up to one year.
On May 3rd, 2007. See this statement in context.