Actually it is binding and was used as precedent as recently as 2010 by the Alaska Supreme Court in Kohlass vs the Lt Governer of Alaska.
https://law.justia.com/cases/alaska/supreme-court/2010/s-13024-1.html
Actually it is a usurpation of powers by the federal government the sovereign states never delegated to it. There is no legitimacy to any decision rendered under this usurpation.