Green hydrogen provides one solution for a just transition to a low-carbon economy in the Global South. Absorption of green hydrogen into the energy mix will assist in decarbonising the hard-to-abate sectors, and it may even contribute to the economies of these countries when they transport to the Global North which has excess demand for it. However, this new pivot may also introduce new energy injustices, and this is what this paper focuses on. Through a comparative law analysis of three countries each from the Asia-Pacific (China, Vietnam and Thailand), South America (Brazil, Chile and Colombia) and Africa (South Africa, Kenya and Namibia), and by looking through the lens of procedural justice, this paper marks the first comprehensive examination of this concept for green hydrogen. It analyses the trajectory of these countries in terms of their introduction of green hydrogen into their renewable energy mix. Then there is an assessment of their successes and failures, the identification of gaps in policy, and the role of procedural justice in moving the green hydrogen legal frameworks forward is also examined. Finally, policy solutions to future-proof green hydrogen legal frameworks for the attention of policymakers are advanced.