Cal. Streets and Highways Code - SHC § 36660. Section 36660.
(a)
Any district previously established whose term has expired, or will expire, may be renewed by following the procedures for establishment as provided in this chapter.
(b)
Upon renewal, any remaining revenues derived from the levy of assessments, or any revenues derived from the sale of assets acquired with the revenues, shall be transferred to the renewed district. If the renewed district includes additional parcels or businesses not included in the prior district, the remaining revenues shall be spent to benefit only the parcels or businesses in the prior district. If the renewed district does not include parcels or businesses included in the prior district, the remaining
revenues attributable to these parcels shall be refunded to the owners of these parcels or businesses.
(c)
Upon renewal, a district shall have a term not to exceed 10 years, or, if the district is authorized to issue bonds, until the maximum maturity of those bonds. There is no requirement that the boundaries, assessments, improvements, or activities of a renewed district be the same as the original or prior district.