(2) subject to any rights, defenses, or privileges which the United States or any agency or person may invoke, Presidential records shall be made available
(A) pursuant to subpena or other judicial process issued by a court of competent jurisdiction for the purposes of any civil or criminal investigation or proceeding;
(B) to an incumbent President if such records contain information that is needed for the conduct of current business of his office and that is not otherwise available; and
(C) to either House of Congress, or, to the extent of matter within its jurisdiction, to any committee or subcommittee thereof if such records contain information that is needed for the conduct of its business and that is not otherwise available; and