In the cases described in this section, a person who—
is, for the purposes of this Act, to be regarded as carrying it on in the United Kingdom.
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The third case is where—
The fourth case is where—
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The sixth case is where—
For the purposes of the preceding subsections it is irrelevant where the person with whom the activity is carried on is situated.
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For the purposes of this section, an AIF is "marketed" when—