The impact of implementation of the anti-tax treaty abuse measures under the Organization for Economic Co-operation and Development (OECD) base erosion and profit shifting (BEPS) project have had far-reaching consequences. The implications of certain BEPS Actions are still being worked through, particularly in relation to the multilateral instrument (MLI or Convention). The MLI constitutes a major change to international taxation and will enable international tax authorities around the world to challenge transactions and structures on a new basis.