Cal. Pub. Res. Code § 5355

If the protest is against the proposed work or improvement and the legislative body finds that the protest is made by the owners of more than one-half of the area of the property to be taxed for the work or improvement, and protests are not withdrawn so as to reduce the same to less than a majority, no further proceedings shall be taken for a period of one year from the date of the decision of the legislative body on the hearing.