[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 fifth region.
[2][3] Suspended in 1930,[a] the 10th district was re-established by the 1977 electoral reforms, which increased the number of single-member seats in the Chamber of Deputies from 196 to 300.
[9][b] The district's head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the state capital, the city of Morelia.
[13][12] 1978–1996 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.