(1)Where the individual shares of the members of an association of persons or body of individuals (other than a company or a co-operative society or a society registered under the Societies Registration Act, 1860 (21 of 1960), or under any law corresponding to that Act in force in any part of India) in the whole or any part of the income of such association or body are indeterminate or unknown, tax shall be charged on the total income of the association or body at the maximum marginal rate:Provided that, where the total income of any member of such association or body is chargeable to tax at a rate which is higher than the maximum marginal rate, tax shall be charged on the total income of the association or body at such higher rate.