CA Prob Code Section 2

(a)

A provision of this code, insofar as it is substantially the same as a previously existing provision relating to the same subject matter, shall be construed as a restatement and continuation thereof and not as a new enactment.

(b)

A provision of this code, insofar as it is the same in substance as a provision of a uniform act, shall be so construed as to effectuate the general purpose to make uniform the law in those states which enact that provision.