(1) The system operator of a designated system governed by the law of the United Kingdom shall, when that system is declared to be a designated system, provide to the designating authority in writing a list of the participants (including the indirect participants) in the designated system and shall give written notice to the designating authority of any amendment to the list within seven days of such amendment.
(1A) The system operator of a designated system governed by the law of a third country must, when that system is declared to be a designated system -
(a) provide to the designating authority in writing a list of any participants in the designated system that are established in the United Kingdom (including any indirect participants in the designated system that are established in the United Kingdom); and
(b) give written notice to the designating authority of any amendment to that list within 7 days of such amendment.
(2) The designating authority may, in writing, require the sy
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