This ad hoc query focuses on the implementation of Article 31(2) of Directive 2016/801, which sets out the conditions for notifying mobility of students between two or more EU Member States. The query examines the mobility notification process, existing arrangements in the absence of an official notification process, and the rules applicable to students covered by an EU programme, a multilateral programme involving mobility measures or an agreement between two or more higher education institutions, as opposed to those applicable to students who are not.