; and (II) any interest excluded from the gross income of the former President under section 103 of such Code for such taxable year, exceeds (if at all) (ii) $400,000, subject to subparagraph (C). (B) Joint returns In the case of a joint return, subclauses (I) and (II) of subparagraph (A)(i) shall be applied by taking into account both the amounts properly allocable to the former President and the amounts properly allocable to the spouse of the former President. (C) Cost-of-living increases The dollar amount specified in subparagraph (A)(ii) shall be adjusted at the same time that, and by the same percentage by which, the monetary allowance of the former President is increased under subsection (c) (disregarding this subsection). (3) Disclosure requirement (A) Definitions In this paragraph— (i) the terms return and return information have the meanings given those terms in section 6103(b) of the Internal Revenue Code of 1986; and (ii) the term Secretary means the Secretary of the Treasury or the Secretary of the Treasury’s delegate. (B) Requirement A former President may not receive a monetary allowance under subsection (a)(2) unless the former President discloses to the Secretary, upon the request of the Secretary, any return or return information of the former President or spouse of the former President that the Secretary determines is necessary for purposes of calculating the applicable reduction amount under paragraph (2) of this subsection. (C) Confidentiality Except as provided in section 6103 of the Internal Revenue Code of 1986 and notwithstanding any other provision of law, the Secretary may not, with respect to a return or return information disclosed to the Secretary under subparagraph (B)— (i) disclose the return or return information to any entity or person