(1)This section applies if a levying authority which is not a billing authority—
(a)intends to impose a BRS for a financial year, but
(b)has not, for that year, given a notice under section 18 in relation to the BRS.
(2)This section also applies if a levying authority—
(a)varies a BRS in accordance with section 10, and
(b)thinks that, as a result of the variation, new calculations are required to find the chargeable amounts that some or all of those subject to the BRS are liable to pay.
(3)The levying authority must give a written notice relating to the BRS to each billing authority which is a lower-tier authority in relation to it.
(4)A notice given for the purposes of a case within subsection (1) must comply with section 18(2).
(5)A notice given for the purposes of a case within subsection (2) must specify—
(a)the variation, and
(b)the day specified for the purposes of subsection (3)(c) of section 10 in the document published for the purposes of subsection (2)(d) of that section.