California Code, Probate Code - PROB § 15003

(a) Nothing in this division affects the substantive law relating to constructive or resulting trusts.

(b) The repeal of Title 8 (commencing with Section 2215) of Part 4 of Division 3 of the Civil Code by Chapter 820 of the Statutes of 1986 was not intended to alter the rules applied by the courts to fiduciary and confidential relationships, except as to express trusts governed by this division.

(c) Nothing in this division or in Section 82 is intended to prevent the application of all or part of the principles or procedures of this division to an entity or relationship that is excluded from the definition of “trust” provided by Section 82 where these principles or procedures are applied pursuant to statutory or common law principles, by court order or rule, or by contract.