Editing Simultaneous substitution (section)

===High-definition television===
[[High-definition television]] signals must also be simultaneously substituted, although this only applies if a local over-the-air [[digital terrestrial television|digital]] transmitter that broadcasts HD content is receivable in the market served by the local cable provider. Since many broadcasters were only required to convert their main, typically major-market transmitters during the 2011 [[Digital television in Canada|digital television transition in Canada]], this means that HD simsubbing is not currently enforceable in many rural areas.

Although the CRTC's policy regarding simultaneous substitutions for high definition broadcasts do not require them to be applied if the quality of the Canadian feed is not equal or better than the American feed, there have been instances in which inferior Canadian feeds were substituted over higher-quality American feeds. In such cases, complaints can be filed to the CRTC, whereas the commission will confer with the applicable BDU and Canadian network about the issue.

[[File:CTVTwosimsub.png|right|200px|thumb|A partially transparent NBC logo is seen on the left. An opaque, grey [[CTV 2|CTV Two]] bug partially covering the NBC logo is seen on the right.]]