Speaking to IRIB in Vienna prior to his flight to Luxembourg, Iranian deputy FM described the process of drafting as complicated and one which bears various technical, legal and political dimensions.
"It needs to be fully scrutinized first at expert and then at deputy levels," Araghchi underlined.
He said Iran's negotiating team headed by Foreign Minister Zarif is scheduled to meet with EU Foreign Policy Chief Federica Mogherini as well as French FM Laurent Fabius, British Foreign Secretary Philip Hammond and German FM Frank-Walter Steinmeier in Luxembourg.
Araghchi stressed that Iran sees no time limit for signing the long-awaited agreement. "If needed, we will extend talks since we seek reaching an acceptable deal which fulfills and respects Iranians' undeniable rights."
He ensured Iran's nuclear program would never stop, with sanctions being fully lifted. "There still exist some gaps in drafting the agreement and the pace of progress is not as much as expected," Araghchi said.