No legally constituted state lacks a means of checking constitutionality. The principle is unanimously accepted without question today and the authors of the first Andorran constitution of 28 April 1993 were profoundly aware of this. Which is why they placed their work, at the very end of the text as if crowning it, under the protection of a constitutional court. Andorra thus took its place among thew democracies in which the primacy of the constitution is proclaimed and guaranteed. While not neglecting the benefits of the experience of other states, the authors of the Andorran constitution succeeded in giving their constitutional jurisdiction the specific traits proper to the history and juridical, sociological and political realities of the country. Through the diversity of its powers the court clearly appears as the vigilant guardian of the constitution. With regard to public authorities, in first place the legislators but also the administrations and judges whose decisions particularly in the domain of freedoms may be deferred to it by means of a procedure known as “amparo”, the constitutional judge is also called upon to act as umpire in conflicts of competence which may arise between constitutional bodies, this being a particularly important attribute at local level in a state in which decentralization is so extensive. The court may also be led to play an advisory role, judges referring to it when they have doubts about the constitutionality of a law, and it will sometimes be invited to give an opinion on the compatibility of a treaty with the constitution. In the Constitutional Court Andorra has given itself an institution which is at one and the same time - as we shall see below - light, competent and independent and well adapted to the solution of the problems which the interpretation of the constitution may give rise to in a legally constituted state.