Complex sentence: The National Disaster Management Authority (NDMA) or National Authority was initially constituted on May 30,2005 by an executive order, and in accordance with Section-3 (1) of the Disaster Management Act, on 27th September, 2006.
Split into simpler sentences: The National Disaster Management Authority (NDMA) or National Authority in short was initially constituted on May 30,2005 vide an executive order. It was formally constituted in accordance with Section-3 (1) of the Disaster Management Act, on 27th September, 2006.