10. Certifying authorities shall continuously monitor natural gas storage system operators as regards compliance with the certification requirements set out in paragraphs 1 to 4. They shall reopen a certification procedure to reassess compliance in any of the following circumstances:
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(a)
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upon receipt of a notification by the natural gas storage system operator pursuant to paragraph 8 or 9;
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(b)
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on their own initiative where they have knowledge that a planned change to rights or to influence over a natural gas storage system operator could lead to non-compliance with the requirements of paragraphs 1, 2 and 3;
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(c)
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upon the reasoned request of the Commission.
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