When the OECD and G20 launched this BEPS process and some of the outcomes of the process required changes to tax treaties, it was recognized that for all states to include those in their tax treaties would be a very lengthy and time-consuming process, due to the requirement of bilateral negotiations. The process of having a multilateral convention was explored, which would update bilateral tax treaties to therefore streamline the process to include and provide updates to tax treaties.
I do think, especially for a country like Canada with a large treaty network, that it is a very efficient process to be able to update a number of treaties with the negotiation and signing of one instrument.