20. Financial provision
(1) Any sum that is required to be paid to the EU or an EU entity to meet any obligation that the United Kingdom has by virtue of the withdrawal agreement is to be charged on and paid out of the Consolidated Fund or, if the Treasury so decides, the National Loans Fund.
(2) After 31 March 2021, subsection (1) does not apply in relation to any expenditure other than sums required to be paid in respect of the traditional own resources of the EU.
(3) Any money received by a Minister of the Crown or a government department by virtue of the withdrawal agreement is to be paid into the Consolidated Fund or, if the Treasury so decides, the National Loans Fund.
(4) A Minister of the Crown, government department or devolved authority may incur expenditure, for the purpose of, or in connection with, preparing for anything about which provision may be made under a power to make subordinate legislation conferred or modified by or under this Act, before any such provision is made.
(5) There is to be paid out of money provided by Parliament -