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4(1)Section 10 of the Social Security Act 1998 (decisions superseding earlier decisions) is amended as follows.E+W+S
(2)In subsection (1), the “and” at the end of paragraph (a) is repealed and after that paragraph there is inserted—
“(aa)any decision under this Chapter of an appeal tribunal or a Commissioner; and”.
(3)After subsection (6) there is inserted—
“(7)In this section—
“appeal tribunal” means an appeal tribunal constituted under Chapter 1 of this Part (the functions of which have been transferred to the First-tier Tribunal);
“Commissioner” means a person appointed as a Social Security Commissioner under Schedule 4 (the functions of whom have been transferred to the Upper Tribunal), and includes a tribunal of such persons.”