8.—(1) Subject to article 9, the provisions of this article regulate the aggregation of AT levels of attainment determined by teacher assessment to calculate subject levels of attainment.
(2) In the case of English, a pupil’s level of attainment in the subject shall be the average of his levels in each AT.
(3) In the case of mathematics, a pupil’s level of attainment in the subject shall be a/b where: a is the aggregate of his levels in each of the four ATs weighted by the following factors: 2:5:2:1 and b is the number of those ATs weighted by the same factors (2:5:2:1).
(4) In the case of science, a pupil’s level of attainment in the subject shall be a/b where: a is the aggregate of his levels in each AT, with his level in AT1 (scientific enquiry) weighted by a factor of two, and b is the number of those ATs, with AT1 weighted by a factor of two.