European Union (Withdrawal) Bill

I just want to make sure that I have understood what my right hon. Friend is saying. Surely what is being proposed here is that Ministers’ ability to use secondary legislation to impose taxes should be constrained, and they will be allowed to impose charges—not that if the Brexit bill is ginormous and the public finances are in a mess, Ministers will have stood at the Dispatch Box now and committed never to increase income tax. That is the correct understanding, is it not?