Following sixteen years of intense diplomatic pressure by the US, the United Nations General Assembly Resolution 3379, which determined that "Zionism is a form of racism", of 1975 was revoked in 1991 by &lt;a href="United%20Nations%20General%20Assembly%20Resolution%2046/86"&gt;resolution 46/86&lt;/a&gt; as a precondition for the participation of Israel to the Madrid Conference.