The declaration of the unconstitutionality of a law and the inapplicability of the provisions affected thereby, may be requested by any person who considers that his direct, personal, and legitimate interest is injured:
1. By means of lawsuit, which must be filed before the Supreme Court of Justice;
2. By plea of exception, which may be made in any judicial proceeding.
A judge or court which hears any judicial proceeding, or the Contentious-Administrative Tribunal, as the case may be, may also request the declaration of unconstitutionality of a law and its inapplicability, before rendering a decision.
In this case and in that provided in subparagraph 2 above, the proceedings shall be suspended and the case referred to the Supreme Court of Justice. (Art. 258)