Cal. Wat. Code § 35549
If a written protest is made pursuant to Section 35546 against the proposed plan and the board finds that the protest represents less than one-half but more than 10 percent of the assessed value of the lands to which delivery of water would be curtailed under the proposed plan, and such protests are not withdrawn to reduce the same to less than 10 percent of such assessed value, the board may adopt such plan subject to approval thereof by the holders of title to the lands to which delivery of water would be curtailed under the proposed plan at a special election to be held for such purpose. Such election shall be called, noticed, held, conducted and the results thereof shall be canvassed in substantially the same manner as provided in this division for the calling, noticing, holding, conducting, and canvassing of general obligation bond elections.
Ca. Water Code § 35549