Haulage Permits and Trailer Registration Bill [HL]

My Lords, I want to ask a very simple question, which is slightly tangential to the amendment, about fuel dipping. Fuel dipping is where the authorities decide, for whatever reason, to test tanks to see how much diesel they are carrying. Of course, these trucks carry a lot of diesel. I do not know where I heard it, but I heard that some countries on the outer periphery of Europe fuel dip in truck tanks so they can charge duty on diesel coming into their country. During the negotiations, we should be aware of any possibility of fuel dipping by member states and make sure that it is excluded and prohibited.