Since 2006, CBRS boundaries have been placed on updated FIRMs by FWS through an interagency agreement with FEMA. However, the CBRS boundaries shown on the FIRMs are for informational purposes only and can serve as a first alert that a property may be located within the CBRS. Until the digital conversion effort is completed for the entire CBRS (projected completion timeframe is 2016), there may be discrepancies in the depiction of CBRS unit boundaries on the FIRMs and on the official CBRS maps maintained by FWS.
Because the official CBRS maps can be difficult to interpret, in November 2012, FWS released to the public an interactive CBRS mapper that can be used to help determine whether a property may be located within the CBRS. The digital CBRS boundaries depicted in the mapper are the best available representations of the official CBRS boundaries and should not be relied on for determining whether a property located close to a CBRS boundary is "in" or "out" of the CBRS (i.e., the area identified within the "CBRS Buffer Zone" on the mapper). If a property is covered by or touches the "CBRS Buffer Zone", an official determination from FWS is recommended.