Implementation of the Commercial Advertisement Loudness Mitigation (CALM) Act

In this document, the Commission makes minor changes to the rules that restrict the volume of television commercials. Specifically, as required by the Commercial Advertisement Loudness Mitigation (CALM) Act, the Commission incorporates by reference into the Commission's rules the Advanced Television Systems Committee's (ATSC) March 12, 2013 A/85:2013 Recommended Practice (RP) (Successor RP), replacing the July 25, 2011 A/85:2011 Recommended Practice (Current RP), incorporated into the Commission's rules in 2011. The Successor RP will become mandatory on June 4, 2015. The 2013 Successor RP applies an improved loudness measurement algorithm to conform to the International Telecommunication Union's (ITU) updated BS.1770 measurement algorithm, "BS.1770-3."