thority”, their communications to him will not be privileged. If, on the other hand, he interviews only those employees with “the very highest authority”, he may find it extremely difficult, if not impossible, to determine what happened.’ ” Id., at 603-609 (quoting Weinschel, Corporate Employee Interviews and the Attorney-Client Privilege, 12 B. C. Ind. & Com. L. Rev. 873, 876 (1971)).
The control group test adopted by the court below thus frustrates the very purpose of the privilege by discouraging the communication of relevant information by employees of the client to attorneys seeking to render legal advice to the client corporation. The attorney’s advice will also frequently be more significant to noncontrol group members than to those who officially sanction the advice, and the control group test makes it more difficult to convey full and frank legal advice to the employees who will put into effect the client corporation’s policy. See, e. g., Duplan Corp. v. Deering Milliken, Inc., 397 F. Supp. 1146, 1164 (SC 1974) (“After the lawyer forms his or her opinion, it is of no immediate benefit to the Chairman of the Board or the President. It must be given to the corporate personnel who will apply it”).
The narrow scope given the attorney-client privilege by the court below not only makes it difficult for corporate attorneys to formulate sound advice when their client is faced with a specific legal problem but also threatens to limit the valuable efforts of corporate counsel to ensure their client’s compliance with the law. In light of the vast and complicated array of regulatory legislation confronting the modern corporation, corporations, unlike most individuals, “constantly go to lawyers to find out how to obey the law,” Burnham, The Attorney-Client Privilege in the Corporate Arena, 24 Bus. Law. 901, 913 (1969), particularly since compliance with the law in this area is hardly an instinctive matter, see, e. g., United States v. United States Gypsum Co., 438 U. S. 422, 440-441 (1978) (“the behavior proscribed by the [Sherman] Act is