In other words, the only issue he has with this bill is that it acknowledges an Executive Order is in place. It doesn't even particularly bless it. Nothing is changing other than a slightly-less tacet approval of an order that has been around for decades. It's not a terribly long bill, check it out yourself
I'm not sure I follow your claim about it only applying with the supreme rulers of the land decide it does. Not to say that various leaders didn't overstep their bounds. An easy example is Lincoln suspending habeus corpus, and then ignoring the judicial review against him on the matter. But this merely requires improved enforcement of the checks and balances in the system.