The mayor was in turn elected by the plenary assembly, with a legal clause providing for the candidate of the most-voted party to be automatically elected to the post in the event no other candidate was to gather an absolute majority of votes.

Local councillors were elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of five percent of valid votes—which included blank ballots—being applied in each local council.

Councillors were allocated to municipal councils based on the following scale: Councillors of municipalities with populations between 100 and 250 inhabitants were elected under an open list partial block voting, with electors voting for individual candidates instead of parties and for up to four candidates.

Additionally, municipalities below 100 inhabitants, as well as those whose geographical location or the best management of municipal interests or other circumstances made it advisable, were to be organized through the open council system (Spanish: régimen de concejo abierto), in which voters would directly elect the local major.

Most deputations were indirectly elected by local councillors from municipalities in each judicial district.