Anti-siphoning laws in Australia regulate the media companies' access to significant sporting events. In 1992, when the country experienced growth in paid-subscription media, the Parliament of Australia enacted the Broadcasting Services Act that gave free-to-air broadcasters preferential access to acquire broadcasting rights to sporting events. The anti-siphoning list is a list of major sporting events that the Parliament of Australia has decided must be available for all Australians to see free of charge and cannot be "siphoned off" to pay TV where people are forced to pay to see them. The current anti-siphoning list came into effect in 2006 and expires 31 December 2010. The Minister for Communications can add or remove events from the list at his discretion. There are currently ten sports on the anti-siphoning list plus the Olympic and Commonwealth Games. Events on the anti-siphoning list are delisted 12 weeks before they start to ensure pay TV broadcasters have reasonable access to listed events, if free-to-air broadcasters decide not to purchase the broadcast rights for a particular event. Any rights to listed sporting events that are not acquired by free-to-air broadcasters are available to pay TV. For multi-round events where it is simply not possible for free-to-air networks to broadcast all matches within the event (e.g. the Australian Open) complementary coverage is available on pay television. The Federal Government is obliged by legislation to conduct a review of the list before the end of 2009. The current anti-siphoning list requires showing listed sports on the broadcaster's main channel.