This chapter, insofar as it is substantially the same as former Chapter 10 (commencing with Section 175) of former Division 1, repealed by Section 18 of Chapter 842 of the Statutes of 1983, shall be construed as a restatement and continuation thereof and not as a new enactment. After December 31, 1984, a reference in a written instrument to the previously existing provisions relating to the subject matter of this chapter shall be deemed to be a reference to the corresponding provisions of this chapter.