TITLE X AMENDMENTS AND REFORM OF THE CONSTITUTIONArticle 245:
Amendments to this Constitution shall be made in the following manner:
- The initiative may come from one fourth of the members of one of the Chambers, or from one fourth of the Legislative Assemblies of the States, by decisions taken in not less than two discussions by an absolute majority of the members of each Assembly;
- The amendment shall be initiated in regular sessions, but action thereon may continue in subsequent special sessions;
- The bill containing the amendment shall be introduced in the Chamber where it was proposed, or in the Senate if it was proposed by the Legislative Assemblies, and it shall be discussed according to the procedure established in this Constitution for the enactment of laws;
- If the amendment is approved by Congress, its Presidency shall transmit it to all the Legislative Assemblies for ratification or rejection in regular sessions, by decisions considered in at least two discussions and approved by an absolute majority of their members;
- The Chambers meeting in joint session, in their regular session of the following year, shall count the votes of the legislative Assemblies and declare the amendment approved with respect to those points that have been ratified by two thirds of the Assemblies;
- Amendments shall be numbered consecutively and shall be published at the end of the Constitution, without altering the text of the latter, but with a footnote to the amended article or articles giving the number and date of the amendment.
This Constitution may also be subject to a general reform, in accordance with the following procedure:
- The initiative must come from one third of the members of Congress, or from an absolute majority of the Legislative Assemblies by decisions adopted in at least two discussions by an absolute majority of the members of each Assembly;
- The initiative shall be transmitted to the Presidency of Congress, which shall convoke the Chambers in joint session with at least three days' advance notice, to decide whether it is in order. The initiative shall be admitted by a two-thirds vote of those present;
- If the initiative is admitted, discussion of the bill shall begin in the Chamber indicated by Congress, and the procedure established in this Constitution for the enactment of laws shall be followed;
- The approved bill shall be submitted to referendum at a time fixed by the Chambers in joint session so that the people may express themselves in favor of or against the reform. The count of the votes will be communicated to the Chambers in joint session, which shall declare the new Constitution sanctioned if it is approved by a majority of the voters of the entire Republic.
Rejected initiatives of amendment or reform may not be reintroduced during the same constitutional term.Article 248
The President of the Republic may not veto amendments or reforms and is obligated to promulgate them within the ten days following their sanction. If he does not do so the provisions of article 175 shall apply.Article 249
The provisions relating to cases of urgency in the procedure for the enactment of laws shall not be applicable to amendments and reforms of the Constitution.