It is defined in Part IX (i.e. section 160) of the Constitution of Spain, and further governed by Organic Laws 2/1979 (a.k.a.

The president is appointed by the Monarch at the proposal of the rest of the Court's magistrates, who elect him or her by majority and for a three-year term with the possibility of a single reelection.

[6] For its election is required to reach in the first ballot the absolute majority; if this majority is not reached, it will be elected in the second ballot that obtains the greatest number of votes; In the event of a tie, a final vote shall be taken and if it is repeated, the senior magistrate shall be proposed for the office of President and, in the case of equal seniority, the oldest candidate bye age.

[6] If the three-year term for which he was appointed did not coincide with the renewal of the Constitutional Court, that term of office shall be extended to end at the time the renewal occurs and the new judges take office.

[6] The President and other Judges of the Constitutional Court shall, upon assuming office before the King, give the following oath or promise:[6] «I swear (or promise) to faithfully obey and enforce at all times the Spanish Constitution, with loyalty to the Crown and to fulfill my duties as Constitutional Magistrate.»Spanish: «Juro (o prometo) guardar y hacer guardar fielmente y en todo tiempo la Constitución española, con lealtad a la Corona y cumplir mis deberes como Magistrado Constitucional.»Since its creation, 12 people have served as president of the Constitutional Court.