4.—(1) The Treasury may by notice in writing require the Bank of England, the PRA or the FCA to provide information or advice specified, or of a description specified, in the notice.
(2) The information or advice must be information or advice which the Treasury consider is necessary to enable it to decide whether to make—
(a)an equivalence determination,
(b)an exemption determination, or
(c)any other determination (other than one referred to in regulation 2 or 3) that a third country has regulatory standards in an area of financial services that are equivalent to those in the United Kingdom as permitted by retained EU law.
(3) The information or advice required by a notice referred to in paragraph (1) must be provided during such reasonable period as may be specified in the notice.
(4) The Bank of England, the PRA and the FCA may provide information or advice to the Treasury in connection with any determination referred to in regulations 2, 3 or this regulation in the absence of a notice under paragraph (1).