At the public hearing, any interested person, including all persons owning taxable property located within the proposed special service area, may file with the municipal clerk or county clerk, as the case may be, written objections to and may be heard orally in respect to any issues embodied in the notice. The municipality or county shall hear and determine all protests and objections at the hearing and the hearing may be adjourned to another date without further notice other than a motion to be entered upon the minutes fixing the time and place it will reconvene. At the public hearing or at the first regular meeting of the corporate authorities thereafter, the municipality or county may delete area from the special service area. However, the special service area must still be a contiguous area as defined in Section 27-5.