The concept of public employment is of incontrovertible importance both for labor law and for the science of public administration. The fact that any manifestation of civil service constitutes a basic part of the administrative framework cannot be disregarded. Thus, the study of civil service is important, especially when the subjects pertaining to the poorly understood public function (mainly treated by Chapter II of Title V of the National Constitution of 1991) are addressed. The public function is governed by constitutional guiding principles that the law specially embodies. However, fragmentary norms are interpreted based on national jurisprudence, and pronouncements often f low from a number of “subrules” that are equipped with a generic and abstract nature. These subrules cannot be inferred directly but require a process of judicial hermeneutics, and only then do they arise as principles of public employment in our country. The focus of this research is to study these judicial pronouncements when a charter policy was in effect. The study relies on jurisprudential lines to describe the corresponding structuring of the chosen principles