Cal. Gov. Code § 9605

Where a section or part of a statute is amended, it is not to be considered as having been repealed and reenacted in the amended form. The portions which are not altered are to be considered as having been the law from the time when they were enacted; the new provisions are to be considered as having been enacted at the time of the amendment; and the omitted portions are to be considered as having been repealed at the time of the amendment. When the same section or part of a statute is amended by two or more acts enacted at the same session, any portion of an earlier one of such successive acts which is omitted from a subsequent act shall be deemed to have been omitted deliberately and any portion of a statute omitted by an earlier act which is restored in a subsequent act shall be deemed to have been restored deliberately.

In the absence of any express provision to the contrary in the statute which is enacted last, it shall be conclusively presumed that the statute which is enacted last is intended to prevail over statutes which are enacted earlier at the same session and, in the absence of any express provision to the contrary in the statute which has a higher chapter number, it shall be presumed that a statute which has a higher chapter number was intended by the Legislature to prevail over a statute which is enacted at the same session but has a lower chapter number.

For the purposes of this section, every statute of an even-numbered year of a two-year regular session of the Legislature is deemed to bear a higher chapter number than any statute enacted in the odd-numbered year of that session.