Thromdes (municipalities) elect Thrompons to lead administration, who in turn represent the Thromde in the Dzongkhag Tshogdu. Likewise, ''geog'' elect headmen called ''gup''s, vice-headmen called ''mangmis'', who also sit on the Dzongkhag Tshogdu, as well as other members of the Geog Tshogde. The basis of electoral constituencies in Bhutan is the ''chiwog'', a subdivision of gewogs delineated by the Election Commission.