The gambling world is waiting with bated breath for the United States Supreme Court decision that could result in an expansion of sports betting. The decision could be announced anytime between today and the end of June.

Since I teach sports betting regulation and gambling law, I’ve been closely watching the developments as well. Although Nevada has had a robust sports betting industry for decades, New Jersey has been at the forefront of the push to legalize sports betting.

In recent years, many other states have prepared for a ruling from the Supreme Court that would overturn the prohibition of sports betting. Even professional sports leagues — which have emerged as the leading opponents of efforts to legalize and regulate sports betting — are looking to cash in.

How we got here

According to the Tenth Amendment of the United States Constitution, “The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.”

For this reason, states have traditionally overseen and regulated casino gambling. The Nevada Supreme Court specifically recognized, in a case involving the infamous Frank Rosenthal (portrayed as Ace Rothstein by Robert De Niro in the movie “Casino”), that gaming is “a matter reserved to the states within the meaning of the Tenth Amendment to the United States Constitution.”

However, in 1992, responding to concerns about the spread of state-sponsored sports wagering, Congress enacted the Professional and Amateur Sports Protection Act, also known as the Bradley Act named after its lead sponsor, then-U.S. Senator Bill Bradley.

The Bradley Act made it unlawful for any governmental entity, such as states, municipalities or Indian tribes to “sponsor, operate, advertise, promote, license, or authorize by law or compact” any sports betting. In addition, the act prohibited any individual from operating any sort of sports betting enterprise.

However, the Bradley Act exempted four states from the prohibition: Nevada, Oregon, Delaware, and Montana. Of these four states, Nevada was – and remains – the only one with full-scale sports wagering. New Jersey was given a one-year window to legalize sports wagering but the state legislature failed to take action within the allotted time.

Fast forward to 2011. That year, New Jersey government officials decided it wanted to have regulated sports wagering, so the state introduced a referendum on a statewide ballot that would amend the state constitution to permit wagering on college, amateur, and professional sports at Atlantic City casinos and racetracks across the state.

New Jersey voters supported the ballot referendum, and in 2012 the New Jersey legislature passed a law to legalize sports wagering.

However, the major professional and college sports leagues – NCAA, NFL, MLB, NBA, and NHL – opposed the legislation, and filed a lawsuit to stop New Jersey from regulating sports wagering.

In response, New Jersey claimed that the Bradley Act was unconstitutional because it violated the state’s Tenth Amendment rights to regulate gambling in the form of sports wagering. In 2013, the Third Circuit Court of Appeals ruled in favor of the leagues and the U.S. Supreme Court declined to consider the case. The Bradley Act remained intact.

New Jersey pressed on. Having lost on the argument that legalizing sports wagering is equivalent to “authorizing” it under the existing Bradley Act, New Jersey got creative and decided to simply repeal the state’s criminal laws and regulations that prohibited sports book operations in casinos and racetracks.

Once again, the sports leagues sued to stop New Jersey. In response, New Jersey argued that it would be a violation of the Tenth Amendment if the state were prevented from repealing an existing law. Again, the lower courts and Third Circuit Court of Appeals ruled in favor of the leagues – but for the first time, the U.S. Supreme Court decided it would weigh in.

Prepping for the inevitable?

Now we await the decision.

It’s important to note that this case is about more than sports betting, which is simply the subject matter before the Supreme Court. It has more to do with state’s rights, and the decision has the potential to affect other areas of dispute, from marijuana legalization, to the ability of cities to protect undocumented immigrants, to gun control.

There are several possible outcomes. The U.S. Supreme Court could decide in favor of the leagues, which would mean New Jersey – and any other non-exempted state – would remain prohibited from allowing any sports wagering.

At the other end of the spectrum, the Court could declare the Bradley Act unconstitutional, and states and Indian tribes would no longer be blocked from authorizing and regulating full-scale sports wagering.

Another possibility is that the Court sides with New Jersey and allows the state to decriminalize sports wagering – on an either limited basis (in casinos and racetracks) or entirely – but not regulate it.

Finally, the Supreme Court could strike the prohibition that prevents states and tribes from permitting sports wagering, but keep the restriction so that individuals cannot conduct legal sports wagering. If this were to happen, sports betting could be permitted by states, but individuals would be prevented from operating their own sports betting business.

About 20 states are already preparing for the event that the Bradley Act gets overturned, and are gearing up to pass laws (or have already done so) that will give them the ability to offer regulated sports wagering.

However, there are many unknowns and issues that will need to be addressed: Will state-sponsored sports wagering be run by state lotteries or private enterprise such as casinos or racetracks? Will amendments be needed to permit Indian tribes to offer sports wagering? And will information on sporting events for wagering purposes – such as scores, outcomes, or game statistics – be restricted to data generated from the leagues?

There are already disagreements over something called an “integrity fee.” In states where sports betting is legal, leagues have been pressing to receive one percent of all amounts wagered on a sporting event.

In Nevada – where legal, regulated sports wagering has taken place since 1949 – such a fee has never been in place. Instead, casinos simply pay the state up to 6.75 percent in a tax on revenues (which is the same tax paid by casinos on other forms of gambling), in addition to a federal tax of 0.25 percent on amounts wagered. States looking to legalize sports betting are proposing varied rates of taxation.

So how might an integrity fee affect sports books?

If we look at the most recent Super Bowl, over $158 million was wagered in Nevada on the game. If there was a mandated integrity fee, this means that the NFL would have received $1.58 million from Nevada sports books.

But in the case of the Super Bowl, Nevada sports books only made $1.17 million, or 0.7 percent of the total amount wagered. So that means that if Nevada sports books had to pay an integrity fee on the Super Bowl, it would have lost money even before having to pay state and federal taxes, rent, employee salaries, and the other costs of operating a sports book. From the industry’s perspective, sports wagering isn’t always as lucrative as it’s often portrayed to be.

For this reason, states must be educated and informed when considering whether to legalize sports betting. If they think they’ll get a tax windfall for schools and roads, they could be sorely mistaken – especially if the leagues end up getting a cut.