Section 42 — Errors and defects in assessment and notice

(1) An assessment, notice, warrant or other proceeding purporting to be made in accordance with this Act shall not be invalidated for want of form or be affected by reason of a mistake, defect or omission, if the—

(a) substance and effect of the assessment is in conformity with the provisions of this Act; and

(b) company assessed or intended to be assessed or affected is designated according to common intent and understanding.

(2) An assessment shall not be invalidated or affected by reason of—

(a) a mistake as to the—

(i) name of a company liable or of a person in whose name a company is assessed,

(ii) the description of any profits, or

(iii) amount of the tax charged; or

(b) any variance between the assessment and the notice, if in cases of assessment, the notice—

(i) is duly served on the company intended to be assessed or on the person in whose name the assessment was to be made; and

(ii) contains, in substance and effect, the particulars on which the assessment is made.