U.S. District Judge Jacqueline Scott Corley on Nov. 4 granted California tribes a preliminary injunction barring Kalshi Inc. and KalshiEX from offering sports event contracts on the plaintiff tribes’ Indian lands.

The Northern District of California order covers any sports contracts, including those that “facially involve, relate to, or reference” baseball, tennis, pickleball, soccer, basketball, football, golf, chess, esports, hockey, motorsports, boxing, wrestling and Ultimate Fighting Championship events. The restriction applies to the plaintiff tribes’ lands, not California statewide.

The ruling turns a disputed voluntary restriction into a court-ordered obligation. In an Oct. 14 joint status report, Kalshi said it had already worked with GeoComply to block sports trading from the tribes’ lands and argued that an injunction was unnecessary. The tribes disputed the blocks’ effectiveness and sought an enforceable order.

Corley’s injunction sets no delayed start date and does not prescribe a particular location-blocking technology. It requires the tribes to provide boundary maps by Nov. 13 and Kalshi to report the steps it has taken to comply within 21 days of the order.