There&#x27;s a distinction between being a signatory vs having ratified the treaty.<p>The US is a signatory (the treaty was signed on 22 March 1990) which is why they are on the list, but it&#x27;s not ratified since the US Congress has never passed legislation which would make the treaty &quot;the law of the land&quot;<p>The Basel Convention joins a distinguished list of signed but unratified treaties including the Convention on Discrimination against Women (CEDAW), the Convention on the Rights of the Child, Comprehensive Test Ban Treaty, and the Anti-Ballistic Missile (ABM) Treaty.