The contributory period for the CPP starts at age 18 and it ends when you pass away, when you reach age 70 or when you start your retirement pension. These are the years. If you have a child under age seven in those years, we need to pro-rate your contributory period and also the amount of the drop-in that we put in, to reflect the period.
On November 1st, 2018. See this statement in context.