Cal. Sts. & High. Code § 5524

The lien of a supplemental assessment, whether bonds issue to represent the supplemental assessment or otherwise, shall be subordinate to all special assessment liens previously imposed upon the said property, but it shall have priority over all special assessment liens which may thereafter be created against the property; and from and after the date of the recording of any warrant, special assessment and diagram, all persons shall be deemed to have notice of the contents thereof.