The pre-admission form is NOT the official registration but just a form that allows to the coordinator to be in touch with students that potentially can apply to the Dual Degree Program.

Coordinator will answer you evaluating your admission.

The official registration has a different procedure dependently to the nationality of the applicant.

For Italian students (or for students that have recidency in Italy). They can apply in the standard way at
"Segreteria Studenti della Facoltà di Agraria, Via San Camillo del Lellis, s.n.c., 01100 VITERBO, ITALY"

For International students. In order to be registered at Italian University a student has to go to the Italian Embassy in his town and explains he would like to apply to an Italian University.
The deadline is March-April but I would suggest to do it as soon as you can so that we can follow your application without problems. 
Documents  to be asked are the following:
Translation and “Dichiarazione di Valore” (declaration of value) of your Degrees (high school, undergraduate and eventually graduate degrees).
The Embassy will send to us these documents after your request.
Once we receive the pre-admission form and the documents from embassy we will contact the students to give all details for the registration.