U.S. District Judge Gordon Gallagher has dismissed a claim filed by the Southern Ute and Ute Mountain Ute Tribes over their right to run online sportsbooks across Colorado under the authorized 2019 Proposition DD.

The choice ends a 15-month legal battle that focused on the tribes' authority to provide statewide online betting without state tax.

The tribes implicated the state of requiring the very same 10 percent tax imposed on business sportsbooks for wagers put outside tribal lands. They argued that this violated federal defenses and their tax-exempt status under the Indian Gaming Regulatory Act (IGRA).

Judge Gallagher's ruling clarified the court's position, stating,

"This Court finds that the gaming takes place where the bettor lies ... If the bettor is on Indian land, IGRA applies. If the gambler is off Indian land, IGRA does not use."

This interpretation efficiently limits the tribes' online sports wagering reach to bookings. It also reinforces Colorado's existing sports wagering structure, which taxes and controls wagers made anywhere else in the state.

Why Judge Gallagher Ruled Against the Colorado Tribes

Judge Gallagher concluded that "gaming happens where the bettor is situated," not where the tribal servers process the bet. His judgment showed a broader understanding of how digital wagering operates beyond standard land-based gaming.

The court noted that IGRA was written "in an easier technological time when both the bettor and the game were most likely in the very same location at the exact same time." This observation highlighted how existing federal law has not progressed to attend to modern, mobile-based betting systems.

Governor Jared Polis' office invited the ruling, mentioning, "We deeply appreciate the government-to-government relationship. We are glad that the court ruled in the state's favor to ensure Colorado can continue to handle sports wagering in a manner that works best for Coloradans."

For the people, the dismissal considerably restricts their ability to launch or broaden statewide mobile sportsbooks without state oversight or tax.

What the Decision Means for Colorado's Betting Landscape

Judge Gallagher's choice even more cements Colorado's control over online sportsbooks and reinforces the state's regulatory authority. While the tribes can still run gaming activities within tribal lands, statewide online wagering remains under state jurisdiction.

The result underscores the legal divide in between standard tribal video gaming and modern digital betting markets.

As online sportsbooks continue to grow in popularity, similar disputes might emerge in other states browsing the intersection of federal tribal law and online betting policy.

Looking to explore your own choices? Have a look at our list of top-rated online sportsbooks offered in your state.