2. Member States shall calculate the weight of packaging waste generated in a given calendar year. The calculation of packaging waste generated in a Member State shall be exhaustive.
The methodology to calculate the packaging waste generated shall be based on the following approaches:
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(a)
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the packaging made available on the territory of a Member State, or unpacked by a producer without being an end user, in that specific year; or
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(b)
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the quantity of packaging waste generated in the same year in that Member State.
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Calculations performed pursuant to this paragraph shall be adjusted to ensure the comparability, reliability and exhaustiveness of the results in accordance with the requirements and verifications to be established by the implementing act adopted pursuant to Article 56(7), point (a).