People in North Carolina may have a little more riding on this year’s NCAA men’s and women’s basketball tournaments, as they will be able to legally bet on the games through their smartphone apps and computers for the first time.

For the sixth straight year, the number of states allowing legal sports betting has expanded since the last rendition of March Madness. A total of 38 states and the District of Columbia now allow some form sports betting, including 30 states that allow online wagering, along with the nation’s capital.

That’s up from one state, Nevada, where people could legally wager on games during the 2018 college basketball tournaments, before the U.S. Supreme Court cleared the way for expansion.

The rules for sports betting vary by state. Some states prohibit bets on home-state college teams or the performances of specific players. Others allow bets not only on the outcomes of any college games but also on a variety of other things, such as the number of points, rebounds and assists that a particular player will tally.

Click through to read more about some things to know about sports betting as the tourneys open, with the men’s games starting Tuesday and the women’s competition beginning Wednesday.