The Federal Communications Commission adopted the rules a year ago, but gave the industry a one-year grace period to adopt them. The FCC is allowing stations to apply for a waiver on implementing the rule if they need more time to comply.
The law requires that broadcast, cable, satellite and other video providers ensure that ads are broadcast at the same volume as the programming around them. It's meant to protect viewers from excessively loud commercials.
Suspected violations can be reported by the public to the FCC on its website.
(Information from CNN and the Associated Press was used in this report.)
The authors of the CALM Act
Rep. Anna G. Eshoo
and Sen. Sheldon Whitehouse (D-RI).