Article 168
1. If a total revision of the Constitution is proposed, or a partial revision thereof, affecting the Preliminary Title, Chapter Two, Section 1 of Title 1, or Title 11, the principle shall be approved by a two-thirds majority of the members of each House, and the Cortes shall immediately be dissolved.
2. The Houses elected must ratify the decision and proceed to examine the new Constitutional text, which must be approved by a. two-thirds majority of the members of both Houses.
3. Once the amendment has been passed by the Cortes Generales, it shall be submitted to ratification by referendum,
