In annexation proceedings, the resolutions, report, notices of hearing, and right of majority protest shall be limited to the territory proposed to be annexed, and shall be waived with the written consent of all of the owners of property within the territory to be annexed. Notice of hearing on the proposed annexation shall be published, posted, and mailed. Mailed notice may be dispensed with as to all property owners who shall have filed a written request for the annexation of their property.