(69)As regards reusable packaging, in order to inform end users about reusability, the availability of re-use systems and the location of collection channels, such packaging should bear a QR code or other standardised, open, digital data carrier that provides such information. The QR code or data carrier should contain information which facilitates tracking and the calculation of trips and rotations, or an average estimation if such calculations are not feasible. That label should be voluntary for open loop systems which do not have a system operator. In addition, reusable sales packaging should be clearly identified at the point of sale.