Thank you very much.
Here's the explanation. Even though it's normal practice to pay reasonable expenses, for travel and other expenses, in practice, it's never written down. Because it's now being written down, it's an obligation. Whereas in practice it's an obligation, it's not in statute. That's why there's a subtle difference if it is written down, and therefore, it's inadmissible. Otherwise, it is a little bit in that grey area. It's not admissible because you are now writing it into the statute to pay them.