Upon the request of a committee of either House of Congress, a joint committee of Congress, or a member of such committee, any officer or employee of the Department of State, the Agency for International Development, or any other department, agency, or independent establishment of the United States Government primarily concerned with matters relating to foreign countries or multilateral organizations may express his views and opinions, and make recommendations he considers appropriate, if the request of the committee or member of the committee relates to a subject which is within the jurisdiction of that committee.