4.—(1) Subject to paragraph (3), the gross expenditure of an authority for a year is the aggregate of the items which are—
(a)attributable to the services administered by the authority during the year, and
(b)charged to a revenue account for that year.
(2) The items mentioned in paragraph (1)—
(a)must be calculated using the estimates which were used to calculate—
(i)the council tax requirement, or
(ii)the levy,
of the authority for the year; but
(b)must not include any—
(i)allowances for contingencies, or
(ii)contributions to financial reserves.
(3) The gross expenditure of the GLA for a year is the aggregate of the amounts of gross expenditure calculated for each constituent body for that year.
(4) In this regulation, “authority” includes a levying body and a constituent body.