The next Form 477 filing is due September 4, 2012 (reporting data as of June 30, 2012).  For this filing, the FCC’s electronic system will only recognize 2010 Census tract codes.  Further information about the Form 477 and 2010 Census tracts is available online: 

• Census Tract Information, Filing Instructions, and a Link to File Form 477:http://transition.fcc.gov/form477
• 2010 Census Tract Reference Maps:http://www.census.gov/geo/www/maps/pl10_map_suite/tract.html
• 2010 Census Tract Relationship Files:http://www.census.gov/geo/www/2010census/tract_rel/tract_rel.html  

For more information about filing Form 477, please contact Scott Friedman at (312) 372-3930 orsfriedman@cm-chi.com.