((a)) Upon receipt of written notice that the Counsel has undertaken, pursuant to , to perform any representational service with respect to any designated party in any action or proceeding pending or to be instituted, the Attorney General shall—
((1)) be relieved of any responsibility with respect to such representational service;
((2)) have no authority to perform such service in such action or proceeding except at the request or with the approval of the Senate; and
((3)) transfer all materials relevant to the representation authorized under to the Counsel, except that nothing in this subsection shall limit any right of the Attorney General under existing law to intervene or appear as amicus curiae in such action or proceeding.
((b)) The Attorney General shall notify Counsel as required by .