1The estimated population of the county or county borough in the appropriate year shall be increased—
(i)if the estimated number of children under five years of age per thousand of the estimated population exceeds fifty, by the percentage represented by the proportion which that excess bears to fifty;
(ii)if, according to the valuation lists in force on the appropriate date, the rateable value per head of the estimated population of the county or county borough is less than ten pounds, by the percentage represented by the proportion which the deficiency bears to ten pounds.
2There shall be estimated and certified the average numbers during the three calendar years immediately preceding the beginning of each fixed grant period of unemployed insured men and of unemployed insured women resident in each county and county borough, and there shall be ascertained the percentage represented by the proportion which the number of unemployed insured men increased by ten per cent. of the number of unemployed insured women bears to the average estimated population of the county or county borough for those three years, and if as respects any county or county borough that percentage exceeds one-and-a-half, the estimated population of the county or county borough in the appropriate year as increased in accordance with Role 1 contained in this Part of this Schedule shall be further increased by a percentage equal to the amount of such excess multiplied by the appropriate multiple.
3There shall be ascertained and certified the number of miles of road in every county other than the county of London, and the estimated population of every such county as increased in accordance with Rule 1 contained in this Part of this Schedule shall be further increased—
(a)in the case of a county in which the estimated population per mile of roads is in the appropriate year less than one hundred, by the percentage represented by the proportion which the difference between two hundred and the estimated population per mile of roads bears to two hundred; and
(b)in the case of a county in which the estimated population per mile of roads is in the appropriate year one hundred or more, by the percentage represented by the proportion which fifty bears to the estimated population per mile of roads.
4The estimated population of the county or county borough as increased in accordance with the provisions of the foregoing rules contained in this Part of this Schedule shall be the weighted population of the county or county borough.
5For the purposes of this Part of this Schedule:—
" The appropriate date " shall, as respects the first fixed grant period, be the first day of October nineteen hundred and twenty-nine, and as respects every other fixed grant period, the first, or in London the sixth, day of April in the last year of the preceding fixed grant period:
" The appropriate multiple " shall, as respects the first and second fixed grant periods, be ten, and as respects any subsequent fixed grant period be a number ascertained in the following manner:—
the ratio which the total amount of the General Exchequer Contribution in the fixed grant period in question bears to the part thereof distributed in that fixed grant period under paragraph (b) of subsection (1) of section eighty-eight of this Act shall be ascertained :
the ratio which the total amount of the General Exchequer Contribution in the first fixed grant period bears to the part thereof distributed in that fixed grant period under the said paragraph shall be ascertained :
the required number shall be such number as bears to ten the same proportion as the ratio ascertained under paragraph (i) of this rule bears to the ratio ascertained under paragraph (ii) thereof.