(94)To increase their effectiveness and ensure the equal treatment of economic operators, the re-use targets should be placed on the economic operators. In the case of re-use targets for beverages, the re-use targets should be placed on final distributors that make beverages in sales packaging available to consumers. Certain beverages that are considered perishable because they are sensitive to microbiological spoilage caused by bacteria or yeasts, need specific aseptic technology to protect them from spoilage while keeping a long shelf life. Therefore, milk and other perishable beverages should be exempt from the obligation to meet the packaging re-use targets. The targets should be calculated as a percentage of sales, volume or weight sold in reusable packaging within a re-use system or, in the case of transport packaging, as a percentage of number of times used. The targets should be material neutral. In order to ensure uniform conditions for the implementation of the re-use targets, implementing powers should be conferred on the Commission as regards the methodology for their calculation.