Sources in the state Returning Officer's office said all documents of Chief Minister Neiphiu Rio of ruling Naga Peoples Front (NPF), former minister K V Pusa of Congress and Akhie Achumi of Socialist Party (India) were found in order.
Last date for withdrawal of candidature is March 26 while polling would be held on April 9.
Meanwhile, with the ongoing state assembly session, no political party officially launched its election campaign even as internal politicking was in progress.