Licensed sportsbooks will be able to offer ESL One Rio Major wagers, by a notice of approval issued by the Nevada Gaming Control Board.
Nevada licensees are allowed to place and accept CSGO bets on three different wager types with this derogation: head-to-head, winner of the match and overall winner.
Both Unikrn, Pinnacle and many other esports betting sites have been offering esports betting without Nevada approval, or much approval expect from regulators like Gambling Commissions.
The approval has been the latest in a long line of Nevada regulatory exemptions from the esports betting of the last few weeks, including League of Legends, Dota 2, iRacing, Overwatch and other Counter-Strike tournaments such as ESL Pro League and ESL Championship.