A alíquota tributária como norma de competência e de segurança jurídica

Abstract

Taking the law as a set of systematized norms (coordination and subordination) and considering the relevance of the communicational process for its analysis, we tried to bring scientific rigor to call the attention to the composition of positive law by the plans of expression (system of legal statements) and of content (system of rules of law). Starting by the study upon the production of the rules of law, we analyzed the relevance of the norms of tax ability and matrix rule of incidence, focusing on the constitutional limits for aliquots to be part of the system of positive law. In this sense, we realized that the norms of tax ability establish a model for tax activities, calling the attention upon the way the setting of the tribute should be observed by the infra-constitutional legislator while fixing the tax aliquots and aiming to set these norms as another criteria of legal security in the Brazilian Tax System. Beyond the identification of the constitutional norms that set the limits of tax ability, we tried to demonstrate that the norms of tax ability regarding the aliquots are not quantitative criteria to the matrix rule of incidence and that, therefore, influence the production of enunciates in the exercise of state imposed competency. All previously stated made it possible to empirically verify the criteria of aliquots setting by the different political tax actors and for the different types of tributes, making it possible to see in which constitutional hypothesis the ordinary legislator is attached or not to observing the competency limits in aliquots setting regarding the legal security of the players that do have the tax obligation. We did not deepen the study in the so called formal limits as they developed according to the agency and the procedure for the production of tax norms, since we understood that as off limits to our original study proposal