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6. The Amparo Proceeding against LawsAs we have indicated in several chapters of this book, one of the particularities of the Mexicanlegal system is the possibility of challenging any act of authority through the amparoproceeding. The apex of this amparo system constitutes the challenge of laws issued bythe Congress that private parties consider to be unconstitutional. In this type of amparoproceeding legislative actions are questioned and the judicial courts analyze whether ornot a particular law complies with the guidelines and fundamental rights contained in theMexican Constitution.By virtue of the above, the Mexican legal system protects private parties against legislativeacts. However, this protection is limited given that it only applies to the personthat files the amparo claim and the decision issued does not benefit all those that did notfile a claim.There are two time periods for filing an amparo claim against a law. The first is 30 daysfollowing the entrance into force of the law if such law generates obligations as soon asit becomes effective. Otherwise the term for the filing of the amparo claim is 15 businessdays from the act of authority in which for the first time the law that is consideredunconstitutional is applied.Finally, the judgment that is issued in the amparo proceeding against a law may bechallenged through a motion for review, which will be resolved by the Supreme CourtJustice in all cases in which there is not any binding court precedent determining theinterpretation of such Court on the constitutionality or unconstitutionality of the law.309Administrative Litigation