|Broadcasters Must Caption Live Streamed Internet Content Beginning March 30, 2013|
via NAB TV TechCheck: FCC rules require that, as of March 30, 2013, TV broadcasters must begin providing Closed Captions on programs that are streamed live (or "near-live") on the internet simultaneously as they air on television. This rule, for example, would affect stations that live stream their daily news casts. This requirement was adopted by the FCC as a result of the Twenty-First Century Communications and Video Accessibility Act of 2010 (CVAA.)
Read more from the NAB here.