(ii) for a labor organization, or a separate segregated fund established by a labor organization, to solicit contributions to such a fund from any person other than its members and their families. (B) It shall not be unlawful under this section for a corporation, a labor organization, or a separate segregated fund established by such corporation or such labor organization, to make 2 written solicitations for contributions during the calendar year from any stockholder, executive or administrative personnel, or employee of a corporation or the families of such persons. A solicitation under this subparagraph may be made only by mail addressed to stockholders, executive or administrative personnel, or employees at their residence and shall be so designed that the corporation, labor organization, or separate segregated fund conducting such solicitation cannot determine who makes a contribution of $50 or less as a result of such solicitation and who does not make such a contribution. (C) This paragraph shall not prevent a membership organization, cooperative, or corporation without capital stock, or a separate segregated fund established by a membership organization, cooperative, or corporation without capital stock, from soliciting contributions to such a fund from members of such organization, cooperative, or corporation without capital stock. (D) This paragraph shall not prevent a trade association or a separate segregated fund established by a trade association from soliciting contributions from the stockholders and executive or administrative personnel of the 261