California Code, Probate Code - PROB § 5048

(a) This chapter, formerly Part 4 (commencing with Section 5600), is operative on January 1, 2002.

(b) Except as provided in subdivision (c), this chapter applies to an instrument making a nonprobate transfer or creating a joint tenancy whether executed before, on, or after the operative date of this chapter.

(c) Sections 5040 and 5042 do not apply, and the applicable law in effect before the operative date of this chapter applies, to an instrument making a nonprobate transfer or creating a joint tenancy in either of the following circumstances: