The cloning of quarter horses is a controversial subject within the multimillion-dollar horse racing business. Yet blocking those steeds from official registration isn’t a violation of the Sherman Antitrust Act, according to a recent decision by the U.S. Court of Appeals for the Fifth Circuit.

The decision that renders judgment for the American Quarter Horse Association (AQHA) is also a big win for organizations whose breed registries regulate entry into the lucrative horse racing and cutting horse competition world, said David Keltner, a partner in Fort Worth’s Kelly Hart & Hallman who represents AQHA.