(1) Subject to subsection (3), where processing of data is for archiving purposes in the public interest, the rights of a data subject set out in Articles 15, 16, 18, 19, 20 and 21 are restricted to the extent that -
(a) the exercise of any of those rights would be likely to render impossible, or seriously impair, the achievement of those purposes, and
(b) such restriction is necessary for the fulfilment of those purposes.
(2) Subject to subsection (4), where processing of data is for scientific or historical research purposes or statistical purposes, the rights of a data subject set out in Articles 15, 16, 18 and 21 are restricted to the extent that -
(a) the exercise of any of those rights would be likely to render impossible, or seriously impair, the achievement of those purposes, and
(b) such restriction is necessary for the fulfilment of those purposes.
(3) Where data is being processed for purposes referred to in subsection (1) and the processing serves another purpose at the sam
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