This law has not been challenged but the possession and sale of shark fins has become an issue, despite the law that prevents the sharks from being hurt in US waters. The outcomes of this law were positive for sharks in US waters, which cannot be finned. This bill protects the sharks from being finned, BUT, the fins are still traded and purchased with other countries, allowing the problem to continue: https://usa.oceana.org/press-releases/congress-introduces-legislation-ban-trade-shark-fins-us