The Ohio Supreme Court has ruled that a 2004 law imposing stricter rules on those suing for asbestos-related injuries can be applied to cases pending before the legislation was passed, a move that could frustrate thousands of people seeking claims.

The 5-to-2 decision Wednesday means that many of the 40,000 Ohio cases filed before the law was enacted are likely to be dismissed. It also has potential ramifications in Florida, Georgia, Kansas and other states that have sought to use such laws to reduce litigation related to the cancer-causing substance.