
      (a) In General. - The United States may obtain in a civil action
    an injunction against - 

        (1) the conduct prohibited under section 175 of this title;

        (2) the preparation, solicitation, attempt, threat, or
      conspiracy to engage in conduct prohibited under section 175 of
      this title; or

        (3) the development, production, stockpiling, transferring,
      acquisition, retention, or possession, or the attempted
      development, production, stockpiling, transferring, acquisition,
      retention, or possession of any biological agent, toxin, or
      delivery system of a type or in a quantity that under the
      circumstances has no apparent justification for prophylactic,
      protective, or other peaceful purposes.
      (b) Affirmative Defense. - It is an affirmative defense against
    an injunction under subsection (a)(3) of this section that - 

        (1) the conduct sought to be enjoined is for a prophylactic,
      protective, or other peaceful purpose; and

        (2) such biological agent, toxin, or delivery system is of a
      type and quantity reasonable for that purpose.

Last modified: April 12, 2006