although pyongyang had agreed with the iaea on february 15 to permit the checks , it held back issuing the necessary visas to the inspection team and demanded that a date be set for a third round of high-level talks with the u.s. following the meeting in new york , north korean representatives said that the third round would open march 21 in geneva , but washington is insisting that seoul - pyongyang talks on the exchange of special envoys be initiated first .