32 Unlike the joint litigation necessary to volunteer in the plurisubjetividad becomes necessary when the law or the legal relationship substantially determine the need for several defendants are, in other words, arises when the presence of a plurality of parties to the proceedings is imposed by the nature of pre-tension itself or discussed the implications of the judicial decision should rest with the process. And so it makes the national tenor, Article 93 of the CPC, which literally reads: “when the decision to fall in the process uniformly affects all co-parties Will only be validly issued and are stationed all appear as joint litigation is active or passive, respectively, unless the law to the contrary “is an exceptional procedural figure, mainly due to the burden in shaping the relationship process, especially liability in the field. (Similarly see: Riverbed). Indeed, because of it, the actor can not choose who litigate, but if it decides that there must necessarily process to sue everyone who can to those who may be affected by the res judicata the same 33 that the Attorney necessary, the dependence is total since we are dealing with the case of a causal standing, complex or common under the legal relationship relating to the claim substantially derived.