(20)Administrators of EU Climate Transition Benchmarks and administrators of EU Paris-aligned Benchmarks should also publish the methodology that they use for the calculation of those benchmarks. That information should describe how the underlying assets were selected and weighted, which assets were excluded and for what reason. In order to assess how the benchmark contributes to environmental objectives, the benchmark administrator should disclose how the carbon emissions of the underlying assets were measured, their respective values, including the total carbon footprint of the benchmark, and the type and source of the data used. In order to enable asset managers to choose the most appropriate benchmark for their investment strategy, benchmark administrators should explain the rationale behind the parameters of their methodology and explain how the benchmark contributes to environmental objectives. The published information should also include details on the frequency of reviews and the procedure followed.