; or (2) the existence of which is known, or by the exercise of due diligence would become known, to the attorney for the Government. (c) Timing Except as provided in subsections (e) and (f), the attorney for the Government shall provide to the defendant any covered information— (1) without delay after arraignment and before the entry of any guilty plea; and (2) if the existence of the covered information is not known on the date of the initial disclosure under this subsection, as soon as is reasonably practicable upon the existence of the covered information becoming known, without regard to whether the defendant has entered or agreed to enter a guilty plea. (d) Relationship to other laws (1) In general Except as provided in paragraph (2), the requirements under subsections (b) and (c) shall apply notwithstanding section 3500(a) or any other provision of law (including any rule or statute). (2) Classified information Classified information (as defined in section 1 of the Classified Information Procedures Act (18 U.S.C. App.)) shall be treated in accordance with the Classified Information Procedures Act. (e) Protective orders (1) In general Upon motion of the United States, the court may issue an order to protect against the immediate disclosure to a defendant of covered information otherwise required to be disclosed under subsection (b) if— (A) the covered information is favorable to the defendant solely because the covered information would provide a basis to impeach the credibility of a potential witness; and (B) the United States establishes a reasonable basis to believe that— (i) the identity of the potential witness is not already known to any defendant