If a person, being a resident other than not ordinarily resident in India within the meaning of clause (6) of section 6 of the Income-tax Act, who at any time during the previous year, held any asset (including financial interest in any entity) located outside India as a beneficial owner or otherwise, or was a beneficiary of such asset or had income from a source outside India and wilfully fails to furnish in due time the return of income which he is required to furnish under sub-section (1) of section 139 of that Act, he shall be punishable with rigorous imprisonment for a term which shall not be less than six months but which may extend to seven years and with fine:
     Provided that a person shall not be proceeded against under this section for failure to furnish in due time the return of income under sub-section (1) of section 139 of the Income-tax Act if the return is furnished by him before the expiry of the assessment year.