At any time not later than the close of the hearing on objections to the formation of the proposed maintenance benefit area, or a change of geographical boundary area, or an increase in the service fees, any owner of property liable to be assessed may make written protest against the formation of the proposed maintenance benefit area, or the change in geographical boundary area, or the increased fees. Such protest must be in writing, must contain a description of the property in which each signer thereof is interested sufficient to identify the same and, if the signers are not shown on the last equalized assessment roll of the county of Sacramento as the owners of such property, must contain or be accompanied by written evidence that such signers are the owners of such property. All such protests shall be delivered to the city clerk, and no other protests or objections shall be considered. (Prior code § 55.03.303)