1. The Commission shall adopt implementing acts in accordance with the examination procedure referred to in Article 50(2) to establish and review at least every two years a list of benchmarks provided by administrators located within the Union which are critical benchmarks, provided that one of the following conditions is fulfilled:
(a) the benchmark is used directly or indirectly within a combination of benchmarks as a reference for financial instruments or financial contracts or for measuring the performance of investment funds, having a total value of at least EUR 500 billion on the basis of all the range of maturities or tenors of the benchmark, where applicable;
(b) the benchmark is based on submissions by contributors the majority of which are located in one Member State and is recognised as being critical in that Member State in accordance with the procedure laid down in paragraphs 2, 3, 4 and 5 of this Article;
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