The Secretary may not designate more than six enterprise zones in any calendar year. For the purpose of this limitation, a calendar year begins January 1 of each year and ends December 31 of the same year beginning in the year 2007. Limit on Number of Zones. A county may not receive more than one designation of an area as an enterprise zone in any calendar year. Joint applications by two or more counties count as one designation of an area as an enterprise zone for each county. Joint applications by two or more municipalities within the same county count as one designation of an area as an enterprise zone within the county. Joint applications by a county and a municipality located within an adjoining county count as one designation of an area as an enterprise zone for each county. Except as provided in §B(6) of this regulation, an application for expansion of a designated enterprise zone is considered a new zone request and is counted as one additional designation of an area as an enterprise zone for the appropriate county or counties. If the geographic area of a proposed expansion area does not exceed 25 percent of the existing geographic area of the enterprise zone, the application for expansion is not considered a new zone request and is not counted as an additional designation of area as an enterprise zone for the appropriate county or counties. A redesignation request is considered a new zone request and is counted as one additional designation of an area as an enterprise zone. An area that is designated an enterprise zone under federal law is designated an enterprise zone, without regard to any limitation as to the number of enterprise zones that may be designated by the Secretary, automatically and without any additional action by the political subdivision or the Secretary. The extraordinary expansion of an enterprise zone may not count toward the limit set forth in §A of this regulation. The Secretary may not grant more than one extraordinary expansion of an enterprise zone throughout the State in any calendar year.