That section, so far as it is material here, runs thus: "Repeal and savings. (1) If immediately before the 1st day of April, 1950, there is in force in any Part B State other than Jammu and Kashmir or in Manipur, Tripura or Vindhya Pradesh or in the merged territory of Cooch Behar any law relating to income tax or supertax or tax on profits of business, that law shall cease to have effect except for the purposes of the levy, assessment and collection of income tax and super tax in respect of any period not included in the previous year for the purposes of assessment under the Indian Income tax Act,, 1922, for, the year ending on the 31st day of March, 1951, or, for any subsequent year. . .A close reading of that provision will show that it saves the operaton of the State law only in respect of 1948 49 or any earlier period 'which is the period not included in the previous year (1949 50) for the purposes of asessment for the year 1950 51.