No station is "forced" to carry a Spanish SAP feed, any station that does so does it voluntarily. In fact, many channels like USA, Disney, Nickelodeon, TNT, TBS, ABC, CBS, NBC and Fox were forced to dump the Spanish audio they were carrying for many of their popular programs in favor of descriptive audio for the blind because of the accessibility act that went into effect last year. Until that act passed, carrying the SAP feed for these channels were optional for the cable, satellite and even the local affiliates of the networks. For example, Spike TV, which isn't a top 5 network so they don't have to follow the accessibility act has a SAP feed that is only used for wrestling, and almost no one carries it. FYI, many of the Spanish stations offer English subtitles if you select CC3.