Cal. Sts. & High. Code § 2806

This division shall not apply to any maintenance district proceedings or to any assessment levied for the maintenance of any improvements, but it shall apply to all other special assessment districts and proceedings within the scope of Section 2820, regardless of the particular law under which any such proceeding may be undertaken and regardless of whether the special assessment made will be specific or a special assessment tax upon lands wholly or partially according to the assessed value of such lands.