Show cause notice validity and tax classification revision upheld despite earlier approval and prior departmental silence.

A show cause notice is valid where it only sets out the authority's revised view on exemption and classification and the basis for proposed action; disclosure of that basis does not amount to prejudgment. Duty may also be recovered for the statutory period preceding the notice under the recovery provision then in force, and such demand is not invalid merely because the department earlier held a different view. An approved classification list and prior inaction do not bar correction of an incorrect classification, because there is no estoppel against law in tax matters. The duty demand was therefore sustained only for the limited period allowed by the later relief notification.

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Issues: (i) Whether the show cause notice was invalid on the ground that it had pre-judged the issue of exemption and classification. (ii) Whether demand of duty for the period preceding the show cause notice was illegal. (iii) Whether an approved classification list and the absence of earlier objection prevented the authority from revising the classification and demanding duty.

Issue (i): Whether the show cause notice was invalid on the ground that it had pre-judged the issue of exemption and classification.

Analysis: The notice did not record a concluded decision against the assessee. It only communicated the revised view of the authority regarding exemption and the proposed action on that basis. A notice of this kind was necessary to enable an effective reply, and disclosure of the basis for the proposed revision did not amount to pre-judging the matter.

Conclusion: The show cause notice was not invalid on the ground of pre-judgment.

Issue (ii): Whether demand of duty for the period preceding the show cause notice was illegal.

Analysis: Rule 10, which was later incorporated as Section 11A, authorised recovery of duty not levied or short-levied for the limited period permitted by law before the notice. A demand covering that statutory period was not a forbidden retrospective levy merely because the department had earlier taken a different view.

Conclusion: The demand for the statutory preceding period was not illegal.

Issue (iii): Whether an approved classification list and the absence of earlier objection prevented the authority from revising the classification and demanding duty.

Analysis: There can be no estoppel against law in tax matters. An approved classification list does not bar correction of an incorrect classification when the proper levy is found to be payable. Principles of res judicata or estoppel do not conclude tax liability for later periods, and the later notification granted relief only for the period specified in it.

Conclusion: The approved classification list and earlier inaction did not prevent reassessment and levy for the relevant period.

Final Conclusion: The duty demand was sustained only for the limited period before the relief notification took effect, and the appeals were disposed of by allowing the revenue's appeal to that extent and dismissing the assessee's appeal.

Ratio Decidendi: A show cause notice is valid if it only discloses the proposed revised view and its basis, and duty can be recovered for the period lawfully permitted under Section 11A notwithstanding an earlier approved classification list, because there is no estoppel against law in tax matters.

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