PASPA, or the Professional and Amateur Sports Protection Act, prohibited 46 states from offering any type of regulated land based betting options. The law was passed in 1992 and exempted Nevada, Oregon, Montana and Delaware. These 4 states already had some type of sports betting available so they were grandfathered in. All other states had a year to pass legislation that introduced regulated betting, but none did so. For over 25 years, PASPA limited these 46 states from introducing any type of sports betting. Even the 4 exempted states could not introduce any new type of betting that wasn’t present at the time of PASPA’s enactment. Only Nevada featured single-game wagering options. PASPA was overturned by the SCOTUS in 2018, and now each state can choose to legalize or prohibit sports betting at their pleasure.