[1] It elects one deputy to the lower house of Congress for each three-year legislative session 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 first region.

[5] The district's head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Ciudad Juárez.

[1] Between 2017 and 2022 the district comprised the municipalities of Ahumada, Ascensión, Buenaventura, Casas Grandes, Galeana, Guadalupe, Ignacio Zaragoza, Janos, Nuevo Casas Grandes and Práxedis G. Guerrero, together with the south of the municipality of Juárez and the southern portion of Ciudad Juárez.

[8] 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.