sentences:  Plenarias cannot take decisions, only develop technical and administrative issues, as they are constituted by committees without decision-making powers.Another method of decision-making is through local and regional plenaries (or plenary assemblies), and congresses, in which industry and various posts unions take active part sending delegations with previously reached and written agreements.The National Plenary does not follow this rule, as in this case the delegations with the written agreements come from the regional confederations.