The requirement for demand notices
2.—(1) For each chargeable period a relevant billing authority must, in accordance with paragraphs 4 to 6, serve a notice in writing on every person who is liable for the BID levy in relation to the BID arrangements for the period.
(2) Different demand notices must be served for different chargeable periods.
(3) A demand notice must be served with respect to the amount payable for every hereditament as regards which a person is liable for the BID levy, though a single notice may relate to the amount payable with respect to more than one such hereditament.
(4) If a single demand notice relates to the amount payable with respect to more than one hereditament the amounts due under it, and the times at which they fall due, must be determined as if separate notices were issued in respect of each hereditament.