Additionally, a 14-member body appointed by Congress will ensure that the proposed text aligns with the 12 institutional and fundamental principles outlined in the agreement.

Independent Democratic Union politician Hernán Larraín, who previously supported the Pinochet dictatorship, was chosen to head the Council of Experts to draft the new constitution.

[21] The Expert Commission (Spanish: Comisión Experta) in Chile is a 24 member body created to assist in the drafting of a new constitution by the second constituent assembly.

As in the previous constituent body, there will be additional seats reserved for indigenous peoples, but this time they will be based on their percentage of votes, and not according to a number set in advance by ethnic group.

There is also gender parity required, in which the lists presented by the parties alternate male and female candidates, with measures in place to adjust should the election result in an imbalance (the final chamber must contain 25 men and 25 women).

This marked a sharp shift from a left-wing majority that freely drafted a rejected first constitutional rewrite in 2021,[14] and reflected disillusionment with the government of President Gabriel Boric, whose approval rating stood at under 35%.

[14] The proposed document was described as "conservative" and "market-friendly", with "strict rules around immigration and abortion",[5] a fact largely credited to the efforts of the Republican Party.

[6][5][7] Support for the "against" option was strongest in the central and northern parts of the country, while the "in favor" performed relatively better in the southern half of Chile,[59] except in Magallanes Region.

[62] Pundit Pablo Ortúzar interpreted the result as a left-wing "vengeance" for the 2022 Chilean constitutional referendum aided by a "dirty campaign".

[63] Within Social Convergence, President Boric's party, there were calls to move into a political "offensive" following the success of the "against" option they had supported.