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Rightsholders often distribute digital content subject to licenses that seek to override exceptions contained in national copyright laws. Recognizing that these license terms could upset their copyright law’s balance between rightsholders and users, legislators around the world have enacted clauses that invalidate license terms inconsistent with their copyright law’s exceptions. This compilation assembles the copyright override prevention clauses adopted in 48 countries over the past 30 years. It also sets forth references to contract override prevention in documents officially presented in the World Intellectual Property Organization, as well as clauses that have been proposed in various fora in the United States.