S. 115BBE : Tax on specified income-Determination of tax in certain cases-Reassessment-Limitation-Alternative remedy-Act provides complete machinery for assessment/reassessment of tax and the assessee is not permitted to abandon that machinery to invoke jurisdiction of the High Court under Art. 226 of the Constitution-S. 115BBE cannot be held unconstitutional on the ground that there an apprehension of misuse of the said provision. [S. 68, 148, 148A, 149, Art. 14, 226]