Decisions of the Supreme Court of Justice shall not be appealable and shall be published in the official gazette. They shall have a general binding effect on processes of abstract and concrete monitoring, when dealing with unconstitutionality. TITLE II CONSTITUTONAL REVISION Section 154 (Initiative and time of revision) 1. It is incumbent upon Members of Parliament and the Parliamentary Groups to initiate constitutional revision. 2. The National Parliament may revise the Constitution after six years have elapsed since the last date on which a law revising the Constitution was published. 3. The period of six years for the first constitutional review shall commence on the day the present Constitution enters into force. 4. The National Parliament, regardless of any timeframe, may take on powers to revise the Constitution by a majority of four-fifths of the Members of Parliament in full exercise of their functions. 5. Proposals for revision should be submitted to the National Parliament one hundred and twenty days prior to the date of commencement of debate. 6. After submission of a proposal for constitutional revision under the terms of item 5 above, any other proposal shall be submitted within 30 days. Section 155 (Approval and promulgation) 1. Amendments to the Constitution shall be approved by a majority of two-thirds of the Members of Parliament in full exercise of their functions. 2. The new text of the Constitution shall be published together with the revision law. 3. The President of the Republic shall not refuse to promulgate a revision law. Section 156 (Limits on matters of revision) 1. Laws revising the Constitution shall respect: