The Enforcing Officer (City Manager or his/her designee) shall have at least one sign, erected on the property to be rezoned (a total area of at least four (4) square feet). Such sign or signs shall, if possible, be located adjacent to streets. Such sign shall be erected on or before the first date of the first notice to property owners and shall be removed immediately after final action by the City Council or when the applicant withdraws the request, whichever comes first. The sign shall contain a notice of rezoning, and the telephone number of the public official from whom the dates of the public hearing may be obtained. The erection or continued maintenance of signs shall not be deemed a condition precedent to the granting of any zoning change or the holding of any public hearing.