A case being heard in federal court in Miami will decide the fate of the city’s world-renowned Ultra Music Festival across the Atlantic Ocean.

Just as tickets were placed on sale for the forthcoming 21st edition of the Miami-born festival on Tuesday, U.S. District Judge Federico A. Moreno presided over litigation between Worldwide Entertainment Group and Adria MM Productions, battling for the right to use the Ultra name for similar electronic music festivals in Europe and Croatia.