Cal. Civ. Code § 773

Subject to the rules of this title, and of Part 1 of this division, a freehold estate, as well as a chattel real, may be created to commence at a future day; an estate for life may be created in a term of years, and a remainder limited thereon; a remainder of a freehold or chattel real, either contingent or vested, may be created, expectant on the determination of a term of years; and a fee may be limited on a fee, upon a contingency, which, if it should occur, must happen within the period prescribed by the statutory rule against perpetuities in Article 2 (commencing with Section 21205) of Chapter 1 of Part 2 of Division 11 of the Probate Code.