It elects one deputy to the lower house of Congress for each three-year legislative period by means of the first-past-the-post system. Votes cast in the district also count towards the calculation of proportional representation ("plurinominal") deputies elected from the third region.[2][3]
The district's head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Ocosingo. The district reported a population of 426,589 in the 2020 Census;[1] with Indigenous and Afrodescendent inhabitants accounting for over 82% of that total, it is classified by the National Electoral Institute (INE) as an indigenous district.[7][a]
The districting scheme in force from 1978 to 1996 was the result of the 1977 electoral reforms, which increased the number of single-member seats in the Chamber of Deputies from 196 to 300. Under that plan, Chiapas's seat allocation rose from six to nine.[14] The 3rd district had its head town at Comitán de Domínguez and it covered 15 municipalities.[15]
↑ The INE deems any local or federal electoral district where Indigenous or Afrodescendent inhabitants number 40% or more of the population to be an indigenous district.[1]
↑ "Chiapas". División del Territorio de la República en 300 Distritos Electorales Uninominales para Elecciones Federales. Diario Oficial de la Federación. 29 May 1978. p.13. Retrieved 25 July 2024. The link provides a list of the constituent municipalities.
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