Applied to exports, it rebates any climate-related charges imposed on goods that are destined for foreign markets where such charges are not imposed on their producers. It has been proposed a number of times and has consistently been rejected in the legislative or regulatory process. But as Parties implement increasingly forceful Paris Agreement commitments, they will inevitably consider the competitiveness and leakage impacts of their policies, and BCA will undoubtedly be weighed as one option for addressing them.