(1)

(a) In this section -

"accounting period" means a period, as determined by the Collector-General from time to time in any particular case, consisting of a number of consecutive taxable periods not exceeding 6 or such other period not exceeding a continuous period of 12 months as may be specified by the Collector-General;

"authorised person" means an accountable person who has been authorised in writing by the Collector-General for the purposes of this section, and "authorise" and "authorisation" shall be construed accordingly.

(b) Where an accounting period begins before the end of a taxable period, the period of time from the beginning of the accounting period to the end of the taxable period during which the accounting period begins shall, for the purposes of this section, be treated as if such period of time were a taxable period, and any references in this section to a taxable period shall be construed accordingly.