Chapter VIII Amending the ConstitutionArticle 136: Initiative
Amendment of the Constitution of the Republic of Croatia may be proposed by at least one fifth of the representatives in the House of representatives of the Croatian Parliament, the President of the Republic, and the Government of the Republic of Croatia.Article 137: Starting Proceedings
1. The House of Representatives, upon hearing the opinion of the House of Counties, decides by a majority vote of all representatives whether or not to start proceedings for the amendment of the Constitution.
2. A draft amendment of the Constitution requires a majority vote of all representatives.Article 138: Majority
A decision to amend the Constitution requires, on the basis of a prior opinion of the House of Representatives, a two-thirds majority vote of all representatives.Article 139: Promulgation
The amendment of the Constitution is promulgated by the House of Representatives of the Croatian Parliament