Cal. Bus. & Prof. Code § 8773.3

In every case where a corner record is filed pursuant to Section 8773, the licensed land surveyor or registered civil engineer shall reconstruct or rehabilitate the monument of such corner, and accessories to such corner, so that the same shall be left by them in such physical condition that it remains as permanent a monument as is reasonably possible and so that the same may be reasonably expected to be located with facility at all times in the future.