Edited sentence: By its terms, the proposed Withdrawal Agreement treaty is a legal contract to pay a sum reportedly between £35bn and £39bn and requires the "Irish backstop"; in exchange Britain would secure a transition phase with no veto rights, be bound to accept all fresh EU law even when it threatened the national interest, and to have an opportunity of starting talks on a deal, the terms of which must be agreed by all 27 EU states (unlike the Withdrawal Agreement)