Under the architecture of the Paris Agreement, the stringency of the global climate policy regime is only as strong as the sum of its parts—that is, emissions reductions commitments formulated by the relevant parties and the policies enacted to achieve them. All parties are bound by a common objective—limiting the rise in global mean temperature to well below 2C, which makes a consistent cross-jurisdictional assessment of their commitment essential. However, they also enjoy substantial flexibility regarding the magnitude of their individual contribution and the nature and stringency of policies they implement, rendering such assessment of their commitment difficult.