5.—(1) Subject to article 6, 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 AT1 (speaking and listening), AT2 (reading) and AT3 (writing).
(3) In the case of mathematics, a pupil’s level of attainment in the subject shall be the average of his levels in each AT.
(4) In the case of science, a pupil’s level of attainment in the subject shall be the average of his level in each AT but with his level in AT1 (scientific investigation) weighted by a factor of three.