Orders against which no appeal or revision shall lie
No appeal and no application for revision shall lie against- (a) an order or notice under section 7 or section 21 initiating an inquiry for assessment or re-assessment;
(b) any order or action under section 13 or under sub-section (1) or sub-section (1A) of section 13A or under sub-section (6) of section 28A.
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