2009 California Water Code - Section 42225-42227 :: Article 2. Units Of Construction

42225.  The board may at any time and from time to time segregate
and divide the plans, specifications, and estimates of cost into one
or more units of construction, and may provide at that time that one
or more individual units of construction shall not be entered upon
immediately, but shall be authorized and undertaken in the order and
at the time the board may thereafter determine.

42226.  In the event of the division of the project into units of
construction, and the specification of one or more units for future
construction, the board shall, when it determines upon the
construction of any unit, pass a resolution to that effect.

42227.  Upon resolving to construct a unit, the board may amend the
plans, specifications, and estimates of costs of the unit by making
changes, modifications, and additions.