Tums the opinion was not a constraint on EPA and they went far beyond. The reason was the opinion provided that EPA or Congress had authority to better define the rule. EPA took the nexus test from the opinion and other prior opinions and broadened the rule to claim authority over any water with a nexus to a navigable water. It includes dry land , small ditches with water only once in a while and more. That is why the lower courts invalidated the rule as beyond their power. The new order I believe instructs the Justice Dept not to proceed with any appeal of the lower courts holding and that EPA has to rewrite the rule. In the meantime Congress needs to greatly reduce the definition of WOTUS and provide that any regulation beyond that is a taking that requires compensation to the landowner.