Who administers direct democracy mechanisms at the national level?

NationalReferendum Act

http://www.election-bhutan.org.bt/index.php?option=com_content&id=167&Itemid=92

Article 568 of the Election Act provides that 'the request for a National Referendum shall be submitted to the Election Commission. Article 5 of the National Referendum Act provides that 'the Election Commission shall hold National Referendum as provided under this Act and the Election Act'.