(1) This section applies to a chargeable person who -
(a) authorises the Collector-General to collect preliminary tax for income tax purposes by the debiting of a bank account of that person in accordance with subsection (2), and
(b) complies with such conditions as the Collector-General may reasonably impose to ensure that an amount of preliminary tax payable by a chargeable person for a tax year will be paid by the chargeable person in accordance with this section.
(2) Preliminary tax appropriate to a tax year for income tax purposes is due and payable in the case of a chargeable person to whom this subsection applies -
(a) as respects the first tax year for which the Collector-General is authorised in accordance with subsection (1) to debit that person's bank account, by way of a minimum of 3 equal monthly instalments in that year, and
(b) as respects any subsequent tax year in which the Collector-General is so authorised, by way of a minimum of 8 equal monthly instalments in that
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