The Secretary may not designate more than six zones in a calendar year. Limit on Number of Zones Designated. A county may not receive more than two zones. A joint application by two or more counties counts as one designation of an area as a zone for each county. A joint application by two or more municipalities within the same county counts as one designation of an area as a zone within the county. A joint application by a county and a municipality located within an adjoining county counts as one designation of an area as a zone for each county. Except as provided in §B(6) of this regulation, an application for expansion of a designated zone is considered a new zone request and is counted as one additional designation of an area as a zone for the appropriate county or counties. An expansion of a zone that does not exceed 50 percent of the existing geographic area of the zone is not considered a new zone request and does not count toward the limit set forth in §A or B(1) of this regulation. An extraordinary expansion of a zone does not count towards the limit set forth in §A or B(1) of this regulation. The Secretary may not grant more than two extraordinary expansions of zones throughout the State in any calendar year.