(1) Subject to this section, an assessment shall become final and conclusive for all the purposes of this Act as regards the amount of the tax assessed under it or the tax relief for allowable losses indicated in it, as the case may be --

(a) on the expiry of the time for appeal against the assessment; or

(b) where an appeal is made, on the appeal being finally disposed of.

(a) shall not apply to an assessment made under section 14 (3) until it is adopted as the assessment for the year of assessment to which it relates;

(b) shall not prevent the Director General from making in respect of any year of assessment-


(i) an assessment under subsection 15 (1) or (2); or

(ii) a revision under subsection 19 (1).



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