This chapter analyzes the adjustments made to the “Basic Principles” section of the original Property Law within the Book on Real Rights of the Civil Code. Key points include the removal of provisions duplicated in the General Part of the Civil Code, the unification of terminology, and a systematic exposition of the real rights system comprising ownership, usufructuary rights, and security interests. It further discusses the legal nature of atypical rights such as quasi-real rights (e.g., mortgages/pledges over rights) and statutory priorities (e.g., construction payment priority), clarifying that the book’s primary focus is on typical real rights, with exceptions noted where applicable.