Abstract
The purpose of this article is to make a rational reconstruction of the use of the proportionality test in contexts of judicial adjudication of constitutional social rights. This reconstruction will be developed in two stages. Firstly, I will deal with the question of whether the proportionality test in its variation by omission (that is, in cases of positive rights) exhibits or not a different structure with respect to its (better known and developed) variation by excess (that is, in cases of negative rights). Secondly, I will describe the rules and forms of argumentation implied in the use of the proportionality test by omission, which constitute its respective sub-tests of suitability, necessity and proportionality stricto sensu. Lastly, I will present a brief summary.