The new policy was put in place in April 2009. The five years will end in 2013-14, for the transition period. The formal period, when there will be the requirement to cover all of the evaluation in the five years, is from 2013-14 to 2017-18. That is when the obligation to cover 100% of direct program expenditures kicks in.
On May 4th, 2010. See this statement in context.