Dividends under MAT = double taxation?

Section 115JB (Explanation 1): For the purposes of this section, "book profit" means the net profit as shown in the profit and loss account for the relevant previous year prepared under sub-section (2), as increased by—

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(i) the amount or amounts set aside as provision for diminution in the value of any asset,

[if any amount referred to in clauses (a) to (i) is debited to the profit and loss account, and as reduced by,—]]]

It is to be only added when u start with profits for computation of book profit which is arrived at after deduction of Dividend. And this was introduced only because  of Vertical format of B/S wherein profits apportioned towards dividend were shown in B/S and so companies took that profit.

Thank you Vineet. I understand now, if the dividend was debited to the P/L account it is added back, if not the P/L stays as it is(i.e reflecting the pre-dividend profit). Thus there is no case of double taxation.

However, could you elaborate more on how the dividend profit was apportioned? Because I thought that the final P/L Account serves as the basis for IT calculation(normal and MAT) and thus the profit apportioned will only affect the P/L Appropriation Account and not the P/L Account. Am I correct?

Thanks in advance, I'm just an engineering student interested in accounting to help with my family's business so any help will be appreciated.