2. The access and participation criteria referred to in paragraph 1 shall be justified in terms of the safety and efficiency of the SIPS and the markets it serves, and be tailored to and commensurate with the SIPS’s specific risks. In compliance with the principle of proportionality, a SIPS operator shall set requirements that restrict access to the minimum possible extent. If a SIPS operator denies access to an applying entity, it shall give reasons in writing, based on a comprehensive risk analysis.