Fees simple determinable and possibilities of reverter are abolished. Every estate that would be at common law a fee simple determinable is deemed to be a fee simple subject to a restriction in the form of a condition subsequent. Every interest that would be at common law a possibility of reverter is deemed to be and is enforceable as a power of termination.
Source:
Section 885.020, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CIV§ionNum=885.020..