[3][4] Members of both houses are elected by proportional representation for four-year terms in eight multi-member constituencies which span the entirety of the province's territory.

As in the National Chamber of Deputies and most other provincial legislatures, elections to both houses of the legislature are held every two years, so that half of its members are up in each election.

Both houses of the Legislature convene in the Legislative Palace of Buenos Aires, in the provincial capital of La Plata.

The building, a city landmark, was designed by Hannover architects Gustav Heine and Georg Hagemann in 1883 and completed in 1888.

[5] Members of both houses of the Legislature are elected in eight multi-member districts known as "Electoral Sections" (Spanish: secciones electorales) that cover the entirety of the province's territory.