where possible, the envisaged period for which the personal data will be stored, or, if not possible, the criteria used to determine that period;
i gcás inar féidir, an tréimhse a meastar go stórálfar na sonraí pearsanta lena linn, nó murar féidir é sin, na critéir a úsáidtear chun an tréimhse sin a chinneadh;