This was a nearly perfect bicameral system, with the two chambers established as "co-legislative bodies". Both chambers had legislative, control and budgetary functions, sharing equal powers except for laws on contributions or public credit, where the Congress had preeminence.
For the Congress of Deputies, 88 seats were allocated to 28 multi-member constituencies and awarded using a partial block voting, with the remaining 321 awarded under a first-past-the-post system in single-member districts. Instead of voting for parties, electors would vote for individual candidates. In districts electing more than one seat and up to four, electors could vote for one less candidate than seats to be filled; in those with more than four seats and up to eight, for up to two less; in those with more than eight seats and up to ten, for up to three less; and for up to four less in multi-member constituencies electing ten seats or more. Candidates winning a plurality of votes in each constituency were elected. In single-member districts were candidates ran unopposed, and in multi-member districts where the number of candidates was equal or less than the number of seats to be filled, candidates were automatically proclaimed without an election. The overall number of seats was determined by the population count, with one seat per each 50,000 inhabitants. Voting was compulsory and on the basis of universal manhood suffrage, with males over twenty-five and at least a two-year residency in a municipality required to vote. Only those above seventy years old, first instancejudges, public notaries and the clergy were exempt from voting. Concurrently, secular males at least twenty-five years old were eligible for the Congress if meeting one of these requirements: (1) having previously held the position of deputy; (2) having been proposed by at least two senators or former senators, two deputies or former deputies for the same province, or three provincial or former provincial deputies within the constituency; Or (3) having been proposed by at least 0.05% of registered electors in the district.
The Senate was not a directly elected body, with its 360 members being divided into three different classes:
The Constitution of 1876 provided for 180 elective senators and an equal number of senators for the other two classes combined. Elective senators served terms of ten years each, with their terms staggered so that approximately one-half of these seats were up for appointment every five years. The King could dissolve the entirety of the elective section of the Senate at will, triggering the appointment of the full contingent of elective senators.
1Liberal Party–Liberal Democrats results are compared to the combined totals of the Liberal Party and Liberal Democratic Party in the 1914 election. 2 While nominally single, unitary alliances, Republican–Socialist Conjunction and Republican Coalition results are disaggregated by member parties for comparison purposes. 3Independent Integrists results are compared to Integrist Party totals in the 1914 election. 4 Turnout average was at 79.7% in constituencies where elections were held.