Specifically, the rules require TV stations, cable operators, satellite TV providers or other multichannel video program distributors (MVPDs) to apply the Advanced Television Systems Committee's (ATSC)
A/85 Recommended Practice ("ATSC A/85 RP") to commercial advertisements they transmit to viewers.
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The FCC relies on consumer complaints to monitor industry compliance with the CALM Act rules. Recognizing that commercials can seem loud, subjectively, without violating the rules, the Enforcement Bureau focuses on patterns or trends of complaints as the basis for enforcement action, rather than pursuing individual, isolated complaints. In the event the Enforcement Bureau notifies a station or MVPD of a pattern or trend of complaints, the station or MVPD must demonstrate compliance with the rules. Stations and MVPDs have two choices for demonstrating compliance with the rules: (1) by demonstrating actual compliance or (2) by demonstrating ongoing compliance with the ATSC A/85 RP.