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In this Part "group" means a group or class of persons who share a common attribute in respect of any of the following matters—
For the purposes of this Part a reference to a group (as defined in subsection (2)) includes a reference to a smaller group or smaller class, within a group, of persons who share a common attribute (in addition to the attribute by reference to which the group is defined) in respect of any of the matters specified in subsection (2)(a) to (g).
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