Cotutelle agreement gives you a chance to simultaneously graduate from the UEF and a foreign university. This is practical, for example, if your research topic is international in its nature, and/or if your supervisor works in a foreign university.
The studies and the degree are carried out at both the universities according to their criteria. Also, the dissertation must comply with the criteria of the both universities. Procedures related to (for example, supervision, pre-examination, or grading) are agreed in the Cotutelle agreement.