4. 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 £900;
(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.