Consensus-Based Decision-Making from GATT 1947 to Marrakesh: Design and Evolution

This chapter examines the institutional design, legal codification and systemic functions of consensus-based decision-making in the multilateral trading system. Originating as an informal, pragmatic “absence of dissent” within the provisional GATT 1947 framework, consensus was formally codified into a treaty-mandated rule under Article IX:1 of the 1994 Marrakesh Agreement. While Article IX:1 establishes voting as a subsidiary mechanism, institutional practice has elevated consensus into a mandatory procedural norm, effectively allowing any Member to prevent the formation of consensus, a feature that some commentators describe as a de facto veto. A major institutional departure occurred in the Dispute Settlement Understanding (DSU), which introduced “negative consensus” to automate dispute adoption and insulate it from political blockages. However, because this reverse mechanism is strictly confined to dispute settlement, it offers no relief to the collective-action constraints plaguing consensus-based rulemaking. Despite causing structural paralysis in negotiations, the consensus rule serves vital operational and legitimacy functions. By operating as a negative standard (“no one disagrees” rather than “everyone agrees”), it provides the necessary flexibility for Members to join compromises without explicit domestic endorsement. This fosters a robust sense of “co-ownership” over outcomes, enhancing compliance and distinguishing consensus from majoritarian voting. Furthermore, consensus reinforces the WTO’s “member-driven” nature and ensures multi-dimensional inclusiveness, protecting the voice and structural representation of economically weaker developing members. Ultimately, the chapter demonstrates that consensus is not merely a procedural decision-making rule, but a deeply embedded culture of rule-oriented interaction aimed at fostering cooperative, durable agreements.