4.—(1) The parental contribution shall, subject to sub-paragraphs (2), (3) and (4) be—
(a)in any case in which the residual income is £16,050 or more but less than £20,515, £45 with the addition of £1 for every complete £13·00 by which it exceeds £16,050;
(b)in any case in which the residual income is £20,515 or more but less than £30,160, £388 with the addition of £1 for every complete £9·20 by which it exceeds £20,515; and
(c)in any case in which the residual income is £30,160 or more £1,436 with the addition of £1 for every complete £7·50 by which it exceeds £30,160.
reduced in each case, in respect of each child of the parent (other than the student) who is wholly or mainly dependent on him on the first day of the year for which the contribution falls to be ascertained, by £75; and in any case in which the residual income is less than £16,050 the parental contribution shall be nil.
(2) The amount or (where a contribution is ascertained in respect of more than one child of the parent) the aggregate amount of the parental contribution shall not exceed £5,800 in any case.
(3) For any year in which a statutory award is held by—
(a)more than one child of the parent;
(b)the parent; or
(c)the student’s step-parent,
the parental contribution for the student shall be such proportion of any contribution ascertained in accordance with this Part as the board (after consultation with any other board or local education authority in Great Britain concerned) considers just, provided that where a contribution is ascertained in respect of more than one child of the parent the aggregate amount of the contributions in respect of each shall not exceed the amount of the contribution that would be ascertained if only one child held an award.
(4) Where in any year a student attends only part of his course the parental contribution for that year shall be reduced pro rata.