(1) Subject to the following provisions of this Article and the provisions of Articles 6 to 9 of this Convention, where a person is gainfully occupied, his liability to be insured shall be determined under the legislation of the Party in whose territory he is so occupied.
(2) Where a person is self-employed in the territory of both Parties, his liability to be insured shall be determined under the legislation of the Party in whose territory he is ordinarily resident. Where the person resides in the territory of Norway, the self-employment shall in all such cases be treated in the same way as self-employment carried out in the territory of Norway.
(3) For the purposes of the provisions of paragraph (2) of this Article “liability to be insured” shall not include liability to pay a Class 4 contribution under the legislation of the United Kingdom.
(4) The insurance liability of persons who are not gainfully occupied shall be determined under the legislation of the Party in whose territory they are ordinarily resident.