Challenges at the intersection between investment provisions in regional trade agreements and implementation of the GloBE Rules under Pillar Two

A number of regional trade agreements (RTAs) include investment protection provisions that may limit a country's ability to change tax measures. This limitation could raise concerns for States as regards the recently agreed global minimum tax under the Global Anti-Base Erosion (GloBE) Rules, as its implementation could amount to a breach of investment obligations. Therefore, this paper analyses how the GloBE Rules and their impact on investment incentives interact with investment provisions in RTAs, also considering the impact of the minimum tax on regional integration efforts and the potential for a regional approach to its implementation.