sentences:  It is a successor to the previous A-35, and complies with the 1972 Anti-Ballistic Missile Treaty.The system is operated by the 9th Division of Anti-Missile Defence, part of the Air Defence and Missile Defence Command of the Russian Aerospace Defence Forces.A memo from the archives of Vitalii Leonidovich Kataev, written around 1985, had envisaged that the system "will be completed in 1987 to provide protection from a strike of 1–2 modern and prospective ICBMs and up to 35 Pershing 2-type intermediate-range missiles".