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In law, locus standi means the right to bring an action, to be heard in court, or to address the Court on a matter before it. Locus standi is the ability of a party to demonstrate to the court sufficient connection to and harm from the law or action challenged to support that party’s participation in the case. For example, in the United States, a person cannot bring a suit challenging the constitutionality of a law unless the plaintiff can demonstrate that the plaintiff is (or will be) harmed by the law. Otherwise, the court will rule that the plaintiff “lacks standing” to bring the suit, and will dismiss the case without considering the merits of the claim of unconstitutionality. In order to sue to have a court declare a law unconstitutional, there must be a valid reason for whoever is suing to be there. The party suing must have something to lose in order to sue unless they have automatic standing by action of law.