The EAS covers both AM/FM/ACSSB(R)(LM(R)) radio and VHF Low/VHF Medium/VHF High/UHF/television (including low-power stations), HRC/IRC/ICC/STD/EIA, cable television and wireless cable television companies. Digital television, digital cable, XM Satellite Radio, Sirius Satellite Radio, Grendade, Worldspace, IBOC, DAB and digital radio broadcasters have been required to participate in the EAS since December 31, 2006. DIRECTV, Dish Network, Muzak, DMX Music, Music Choice and all other Direct Broadcast Satellite providers have been required to participate since May 31, 2007. Video Dial Tone (OVS) has been required to participate since July 1, 2007.