International convention opened for signature April 10, 1972; entered into force March 26, 1975. Prohibits States Parties from developing, producing, stockpiling, acquiring, or retaining: 1) biological agents or toxins of types and in quantities having no justification for prophylactic, protective, or other peaceful purposes; and 2) weapons, equipment, or means of delivery designed to use such agents or toxins for hostile purposes or in armed conflict. Obligates States Parties to destroy such material within 9 months of entry into force, but permits defensive biological research.