for each polling station; Presiding Officers are in turn assisted by Polling Officers. Returning Officers also appoint Counting Personnel for the tallying and inspection of votes. The Election Commission may appoint independent observers, and with the approval of the Ministry of Foreign Affairs, may also include international observers, any of whom may bring apparent irregularities or violations of the law to the attention of the Election Commission. All Election Officers are bound by a code of conduct forbidding corruption, conflicts of interest, and acts or speech of a political nature. The same code of conduct mandates Officers to assist the "physically challenged," a category that includes the visually impaired, physically disabled, illiterate individuals, and inhabitants of remote areas. Delimitation Commission The ancillary Delimitation Commission consists of six persons: the Chief Election Commissioner and two Election Commissioners; the Secretary of the Ministry responsible for Urban and Municipal Administration; the Secretary of the Ministry responsible for Civil Registration and Census; and the Surveyor-General. The Delimitation Commission periodically re-allocates a maximum of 55 National Assembly seats among Dzongkhags, and controls the number of representatives at leach level of local government, subject to review and approval of the Election Commission. The Delimitation Commission divides dzongkhags, gewogs, and dzongkhag thromdes into relevant constituencies based on voter population, contiguity of areas, and geographical conditions.(Delimitation) The Commission regularly publishes updates in several media to disseminate its information. Constituencies The Bhutanese electorate is composed solely of single member constituencies at both national and local levels. The National Assembly should have a maximum of 55 partisan members that are directly elected by Dzongkhag voters. Each Dzongkhag must have between two and seven constituencies for the National Assembly elections. The Constitution provides that members sit for five years, or until dissolution upon a vote of no confidence. The National Council has 25 members comprising one directly elected nonpartisan representative from each of the twenty dzongkhags and five "eminent persons" nominated by the king. Every gewog and independent thromde ("dzongkhag thromde") comprises a constituency that nominates one candidate for the National Council through a democratic election called a zomdu overseen by heads of local government and run by the Dzongkhag Electoral Officer. The members of the National Council are elected for five year terms. The local Dzongkhag Tshogdu comprises one elected Gup (headman) and Mangmi (deputy) from each Gewog Tshogde; one elected representative from that Dzongkhag Thromde; and one elected representative