Cal. Wat. Code § 72142.1
Immediately after adopting its resolution levying the assessment, which levy shall thereupon be effective as to all production from the Chino Basin within the primary district, the board shall notify and direct the other Chino Basin districts to levy similar assessments on production from the Chino Basin within each Chino Basin district at an identical rate. The boards of directors of each Chino Basin district other than the primary district shall on or before 30 days after receipt of such notice levy such assessment against all production from the Chino Basin within its boundaries within 30 days after the final date for receipt of annual reports and the payments of assessments, all net assessment proceeds collected by any Chino Basin district, less all costs of administration and collection, shall be delivered to the primary district.
Ca. Water Code § 72142.1