4. In the case of an old award the provisions of Schedule 3 shall, as respects any sandwich year, have effect subject to the following modifications—
(a)the sum to be disregarded under paragraph 1(1)(a) of Part I shall be the prescribed proportion of £800 and the reference in paragraph 1(1)(c) to £1,810 shall be construed as a reference to the aggregate of £1,010 and the prescribed proportion of £800;
(b)in calculating the student’s income,
(i)there shall be disregarded any payment made to him by his employer in respect of any period of experience;
(ii)the prescribed proportion of his income shall be treated as if it were the whole of his income;
(c)the amount of the parental contribution applicable to his case shall be the prescribed proportion of the contribution ascertained in accordance with Part II;
(d)the amount of the spouse’s contribution applicable to his case shall be the prescribed proportion of the contribution ascertained in accordance with Part III;