Upon occurrence, notify FEMA in writing whenever the boundaries of the City have been modified by annexation or the community has assumed authority over an area, or no longer has authority to adopt and enforce floodplain management regulations for a particular area. In order that the City's Flood Insurance Rate Map accurately represent the City of Sylvania's boundaries, include within such notification a copy of a map of the City suitable for reproduction, clearly delineating the new corporate limits or the new area for which the City has assumed or relinquished floodplain management regulatory authority.