The installation of a system of access control and timetable based on the identification of the workers of a Public Administration through the biometric pattern entails the data processing personal. In so far as the collection of these biometric data is carried out in a juridical work or administrative relation and has the control as a purpose, precisely, of its fulfillment, the Administration can treat them and pick them up without the need for requiring the consent from the affected ones. In this case, the fulfillment of the duty of information will have to be produced in the moment of the initial collection of the biometric pattern.