(a) When the facts disclosed by an investigation indicate that an enforcement action is warranted, further proceedings may be instituted in Federal or State court or pursuant to the Bureau's administrative adjudicatory process. Where appropriate, the Bureau also may refer investigations to appropriate Federal, State, or foreign governmental agencies.

(b) When the facts disclosed by an investigation indicate that an enforcement action is not necessary or would not be in the public interest, the investigational file will be closed. The matter may be further investigated, at any time, if circumstances so warrant.

(c) The Assistant Director of the Office of Enforcement and the Deputy Assistant Directors of the Office of Enforcement are authorized to close Bureau investigations.