5.—(1) Subject to article 6, the provisions of this article regulate the aggregation of AT levels of attainment determined in accordance with article 4 to calculate subject levels of attainment.
(2) In the case of English, a pupil’s level of attainment in the subject is the average of his or her levels in each AT.
(3) In the case of Welsh a pupil’s level of attainment in the subject is the average of his or her levels in each AT, weighted by the following factors—
AT1 (oral) 4;
AT2 (reading) 3; and
AT3 (writing) 3.
(4) In the case of mathematics, a pupil’s level of attainment in the subject is the average of the pupil’s levels in each AT but with his or her level in AT2 (number and algebra) weighted by a factor of two.
(5) In the case of science, a pupil’s level of attainment in the subject is the average of the pupil’s levels in each AT but with his or her level in AT1 (scientific enquiry) weighted by a factor of two.