Anti-siphoning laws and regulations are designed to prevent pay television broadcasters from buying monopoly rights to televise important and culturally significant events before free-to-air television has a chance to bid on them. The theory is that if such a monopoly was allowed, then those unable or unwilling to obtain access to the pay television service would be unable to view the important and culturally significant events. [1] Generally the laws allow pay-TV to bid for such monopoly rights only if free-to-air television has declined to bid on them.
Notable examples of such policies are present in Australia and the United Kingdom. Anti-siphoning in the United States was introduced by the FCC in 1975 and was soon overturned as unconstitutional. Some sports leagues do contractually obligate that their broadcasters include a certain number of telecasts on over-the-air television as part of their overall contracts. For games broadcast exclusively by pay television channels, the National Football League similarly requires syndicated, over-the-air simulcasts in the markets of the teams involved, to ensure that all of a team's games are available locally on broadcast television.