Sch 9ZE para 13
(1) A person who is required to submit an IOSS scheme return must pay, by the deadline for submitting the return, the amounts required in accordance with paragraph 10 in respect of qualifying supplies of goods made in the reporting period to which the return relates. (2) A payment under this paragraph must be made in such manner as the Commissioners may direct (by means of a notice published by them or otherwise) or may by regulations require.