5.—(1) In the cases of English, mathematics, a modern foreign language and science, the purpose of the assessment shall be to determine the level of attainment achieved by the pupil in each AT specified for the subject that applies to him and, subject to article 6(3), in the subject as calculated in accordance with paragraph (3).
(2) The results recorded shall consist of a statement of each level of attainment achieved by the pupil (whether or not that level is specified in relation to the third key stage by the relevant section 87(3)(a) and (b) order) in relation to every AT mentioned in paragraph (1) and, subject to article 6(3), of his level in the subject so calculated.
(3) Subject to article 6, a pupil’s level of attainment in each subject shall be a/b where: a is the aggregate of his levels in each of the ATs weighted by the following factors: 4:9:4:3 and b is the number of those ATs weighted by the same factors (4:9:4:3).