1. The provision of a benchmark shall be governed by the following requirements in respect of its input data:
(a) the input data shall be sufficient to represent accurately and reliably the market or economic reality that the benchmark is intended to measure. The input data shall be transaction data, if available and appropriate. If transaction data is not sufficient or is not appropriate to represent accurately and reliably the market or economic reality that the benchmark is intended to measure, input data which is not transaction data may be used, including estimated prices, quotes and committed quotes, or other values;
(b) the input data referred to in point (a) shall be verifiable;
(c) the administrator shall draw up and publish clear guidelines regarding the types of input data, the priority of use of the different types of input data and the exercise of expert judgement, to ensure compliance with point (a) and the methodology;
(d) where a benchmark is based on input data from co
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