Prior to the assessment year 1950-51 the assessee was assessed under the Indian Income-tax Act, 1922 in the status of a non-resident Hindu c Undivided Family. The income received by the assessee in the former Indian State of Madhya Bharat was not subject to tax under the Act but was taken into consideration in computing its "world incorile" for the purpose of determining the rate. After the Constitution calne into force the present definition of "taxable territories" was incorpo,.ted into the Income-tax Act by the Finance Act, 1950 and the areas' in which the assessee was carrying on business with which this appeal is concerned D were included therein with the result that for the assessment year 195051 the assessee who was a resident of Madhya Bharat was deemed to be a resident in the "taxable territories" during the "previous year" and . hence liable to be taxed in respect of its income received in Madhya Bharat. Prior to the assessment year 1950·51 the assessee had proceeded on the basis that its account year ended on Diwali day, but fdr the assessment year 1950-51, in respect of its income from business in Madhya Bharat it chose the financial year ending on March 31, 1950 as E the "previous year". The Income Tax Officer as well as the Appelate Assistant Commissioner rejected the claim of the assessee that it could make such a choice. The Tribunal reversed the finding of the Income Tax Officer and the High Court on reference agreed with the tribunal. On the ques· tion whether under the circumstances of the case, having regard to s. 2( ll)(i)(a) of the Income Tax Act, 1922, the assessee is entitled to take the year ended on 31-3-1950 as the "previous year" relevant to the assessment year 1950-51 in respect of his sources of income arising outside F tl•e '1axable territory",