The minister announced the government's approach to tax gap. She announced it on April 11. It will be a series of things as opposed to one big bang. What she committed us first to was a conceptual paper on the definition of tax gap, on approaches to measurement, on the methodological issues, and on the approach that the agency would be taking. She also committed to a specific tax gap, and I think we were fairly clear that it would be the GST/HST domain that would be the first thing. That was committed for before the summer, as I recall.
On May 5th, 2016. See this statement in context.