30The reply to the question referred by the national court must therefore be that a national rule which provides that the supplement to a mineworker's retirement pension is to be reduced by the amount of a retirement pension which the person concerned may claim under a scheme of another Member State constitutes a provision for reduction of benefit within the meaning of Article 12(2) of Regulation No 1408/71, as amended by Regulation No 2001/83, and within the meaning of Articles 12(2), 46(3) and 46b of that version of Regulation No 1408/71, as amended by Regulation No 1248/92.
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