18 U.S.C. § 177 — Injunctions

(a) In General: The United States may obtain an injunction in a civil action against: (1) conduct prohibited under section 175 of this title; (2) preparing, soliciting, attempting, threatening, or conspiring to engage in conduct prohibited under section 175; or (3) developing, producing, stockpiling, transferring, acquiring, keeping, or possessing — or attempting to do any of these — a biological agent, toxin, or delivery system of a type or in a quantity that under the circumstances has no apparent justification for a prophylactic, protective, or other peaceful purpose. (b) Affirmative Defense: Against an injunction sought under subsection (a)(3), it is an affirmative defense that: (1) the conduct sought to be stopped is for a prophylactic, protective, or other peaceful purpose; and (2) the biological agent, toxin, or delivery system is of a type and quantity reasonable for that purpose.