Iran’s lead negotiator in Vienna affirmed that the “resumption of voluntary application of Additional Protocol [to the NPT] by Iran is predicated on sanctions being lifted. We’d like to get to it before 21 May [the end date of Iran’s technical agreement with the IAEA], if possible”. He further asserted that “we’re serious and determined, ready to do it even tomorrow: once sanctions are verifiably lifted, we'll return to full implementation of JCPOA”.