Cal. Pub. Resources Code § 9964
The district may, with the consent of the owner, levy special assessments on the lands of the consenting owner within the district pursuant to the Municipal Improvement Act of 1913 (Division 12 (commencing with Section 10000) of the Streets and Highways Code) or the Improvement Act of 1911 (Division 7 (commencing with Section 5000) of the Streets and Highways Code) and issue bonds to represent unpaid assessments pursuant to the Improvement Act of 1911 or the Improvement Bond Act of 1915 (Division 10 (commencing with Section 8500) of the Streets and Highways Code) to finance the construction of improvements on those lands as provided by Section 9409.
Notwithstanding any provisions of Division 7 (commencing with Section 5000) or Division 12 (commencing with Section 10000) of the Streets and Highways Code, the district may contract for the construction of these improvements without inviting public bids therefor.
Ca. Pub. Res. Code § 9964