Civil Code › DIVISION 2. PROPERTY › PART 1. PROPERTY IN GENERAL › TITLE 2. OWNERSHIP › CHAPTER 2. Modifications of Ownership › ARTICLE 1. Interests in PropertyCivil Code § 691‹ § 690§ 692 ›Copy linkOpen in browserleginfo ↗691.A perpetual interest has a duration equal to that of the property.(Enacted 1872.)