At any time, not later than the hour set for hearing on such resolution of intention, any holder of title to land to which delivery of water would be curtailed under the proposed plan may make written protest. Such protest shall be in writing, shall contain a description of the property in which each signer has an interest sufficient to identify the same, and, if any signer is not shown on the last equalized assessment book of the district or, if used as the basis for the mailing of notice, the last equalized assessment roll of Kern County, such protest shall contain or be accompanied by written evidence that such signer is the owner of such property or of an interest therein. All such protests shall be delivered to the secretary of the district.