This chapter explores the role of customary norms, general principles of international law, and jus cogens in forming human rights law. It discusses the importance and challenges of integrating noncodified sources into the human rights framework. The chapter examines how customary international law and general principles of law contribute to the development and application of human rights norms. It also discusses the concept of jus cogens and its role in establishing fundamental human rights norms that cannot be derogated. The chapter highlights the challenges in identifying and applying noncodified sources of human rights law and the need for a comprehensive approach to integrate these sources into the human rights framework.