; (5) if the Office determines, during the course of any investigation under this subtitle, that a lobbyist or lobbying firm may be in noncompliance with the Lobbying Disclosure Act of 1995 ( 2 U.S.C. 1601 et seq.),— (A) to notify the United States Attorney for the District of Columbia and the Director of the Office of Public Integrity of the potential violation; and (B) to notify the lobbyist or lobbying firm of such determination, in writing; (6) to provide informal guidance to lobbyists or lobbying firms engaged in lobbying activity or lobbying contacts under the Lobbying Disclosure Act of 1995 ( 2 U.S.C. 1601 et seq.) to covered legislative branch officials (as defined in section 3 of such Act ( 2 U.S.C. 1602 )) of their responsibilities under such Act; (7) to aid in the enforcement of ethics requirements for Members or employees of Congress under this subtitle or any other provision of law