(a) Except as explicitly provided to the contrary, nothing in this chapter shall reduce or limit the responsibilities of any labor organization or any officer, agent, shop steward, or other representative of a labor organization, or of any trust in which a labor organization is interested, under any other Federal law or under the laws of any State, and, except as explicitly provided to the contrary, nothing in this chapter shall take away any right or bar any remedy to which members of a labor organization