Provided that the Appellate Tribunal may, if it is satisfied that the applicant was prevented by sufficient cause from presenting the application within the period hereinbefore specified, allow it to be presented within a further period not exceeding thirty days.

(2) If, on an application made under sub-section (1), the Appellate Tribunal refuses to state the case on the ground that no question of law arises, the assessee or the Principal Commissioner or Commissioner, as the case may be, may, within six months from the date on which he is served with notice of such refusal, apply to the High Court, and the High Court may, if it is not satisfied with the correctness of the decision of the Appellate Tribunal, require the Appellate Tribunal to state the case and to refer it, and on receipt of any such requisition, the Appellate Tribunal shall state the case and refer it accordingly.

(2A) The High Court may admit an application after the expiry of the period of six months referred to in sub-section (2), if it is satisfied that there was sufficient cause for not filing the same within that period.

(3) Where in the exercise of its powers under sub-section (2), the Appellate Tribunal refuses to state a case which it has been required by the assessee to state, the assessee may, within thirty days from the date on which he receives notice of such refusal, withdraw his application, and, if he does so, the fee paid shall be refunded.