As outlined in the ordinance: The property must meet all criteria below to be eligible for a UAIZ contract: Size: Minimum 0.10 acres (4,356 sq. Easily Create an Irrigation Contract for Your Customers.Download a free irrigation contract template to establish clear service terms with your clients. The California Constitution requires Assessors to assess for property taxation purposes living improvements, such as grapevines, and fruit and nut trees. SWP Water Supply Contracts. DWR administers long-term water supply contracts to 29 local water agencies for water service from the SWP. SCHEDULE AND FORMS (Must be returned along with the Bid Form):.