70.5—Letter of Map Amendment.
         Upon determining from available scientific or technical information that a FHBM or a FIRM requires modification under the provisions of  § 70.4(b), the Administrator shall issue a Letter of Map Amendment which shall state:
    
    
    
    
        
        (c) 
         The identification of the property to be excluded from a designated A, AO, A1-30, AE, AH, A99, AR, AR/A1-30, AR/AE, AR/AO, AR/AH, AR/A, VO, V1-30, VE, or V Zone.