Paragraph 18

Until such time as the aggregate of the authorities' supplementary amounts calculated under paragraphs 15, 16 and 17 equals the aggregate of the amounts specified in sub-paragraphs (a), (b) and (c) of the definition of U in paragraph 14, the calculations set out in paragraphs 16 and 17 shall, subject to the modifications set out below, continue to apply to calculate the supplementary amount for those appropriate authorities to whom neither paragraph 15 nor 17 has applied; and for that purpose–

(a)

X shall apply as if the supplementary amount were the amount calculated under paragraph 16 or, if by virtue of this paragraph there has been more than one calculation, the last amount calculated under that paragraph in respect of that appropriate authority;

(b)

Y shall apply as if the amount to be deducted to determine the balance of the total amount available were the aggregate of the supplementary amounts for appropriate authorities to whom, in the calculation under paragraphs 16 and 17 or, if there has been more than one calculation under those paragraphs, the last such calculation, paragraph 17 applied; and

(c)

Z shall apply as if the total of the supplementary amounts were the total of all the supplementary amounts calculated under paragraph 16 or, if by virtue of this paragraph there has been more than one calculation, the last calculated under that paragraph in respect of all appropriate authorities to whom paragraph 17 did not apply in that calculation.