The act as amended by Bill C-23A provides for a 10-year waiting period in the case of a serious personal injury offence—possession of marijuana would not qualify under that definition—or offences referred to in schedule 1, which are child sex offences that were prosecuted by indictment. I cannot see possession of marijuana falling within a 10-year waiting period. It would fall within either a five-year or a three-year waiting period.
On November 17th, 2010. See this statement in context.