A shared backup N.SIS as referred to in point (b) may be used jointly by two or more Member States. In such cases, the shared backup N.SIS shall be considered as the backup N.SIS of each of those Member States.
Féadfaidh dhá Bhallstát nó níos mó N.SIS, dá dtagraítear i bpointe (c), cúltaca comhroinnte a úsáid go comhpháirteach agus measfar é sin mar N.SIS cúltaca gach ceann de na Ballstáit rannpháirteacha.