Exemption notifications and limitation for duty demand on internal clearances must follow the wording and governing rule, not departmental misconstruction.

Board exemption directions issued under Rule 8 were construed according to their own language: they allowed small quantities of soda ash to be cleared duty-free for use within the factory, and were not confined to soda ash used only in purification of brine for a particular product. The later circulars merely adjusted the method of calculating the exempt quantity and could not narrow the earlier exemption. On limitation, the soda ash removals were not clandestine and were made on officers' directions, so Rule 9 did not apply; the short levy arose from departmental error, bringing the demand within Rule 10 rather than the residuary Rule 10A. The demand notice was issued beyond time and was quashed, with refund directed.

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Issues: (i) Whether the Board's exemption decisions and trade notices permitted duty-free soda ash used within the factory for industrial processes without restricting the exemption to soda ash used only in purification of brine for a particular product; and (ii) whether the demand for duty on duty-free clearances was barred by limitation and outside the scope of Rule 9 or Rule 10A of the Central Excise Rules, 1944.

Issue (i): Whether the Board's exemption decisions and trade notices permitted duty-free soda ash used within the factory for industrial processes without restricting the exemption to soda ash used only in purification of brine for a particular product.

Analysis: The exemption directions issued by the Central Board were treated as exercises of the power to grant exemption under Rule 8 of the Central Excise Rules, 1944. Their language allowed small quantities of soda ash to be issued free of duty for use within the factory for manufacture of excisable or non-excisable commodities, and the later circulars only altered the method of computation of the exempt quantity. The words used did not import a further condition that the soda ash must relate only to purification of brine as an essential ingredient in the manufacture of a particular product. The later clarification could not override or narrow the earlier exemption decisions.

Conclusion: The exemption was not confined to soda ash used in purification of brine for a particular product, and the assessee was entitled to duty-free clearance within the prescribed limit.

Issue (ii): Whether the demand for duty on duty-free clearances was barred by limitation and outside the scope of Rule 9 or Rule 10A of the Central Excise Rules, 1944.

Analysis: The removal of soda ash was not clandestine or evasive, and the excise officers themselves had directed the assessee to use requisition slips instead of AR-1 forms for internal duty-free clearances. In such circumstances, Rule 9 was inapplicable. The short levy arose from error or misconstruction by the department, bringing the matter within Rule 10, under which the demand had to be made within the prescribed period. Rule 10A, being residuary, did not apply where Rule 10 governed the demand. The demand notice was issued beyond the permissible period.

Conclusion: The demand was time-barred under Rule 10 and could not be sustained under Rule 9 or Rule 10A.

Final Conclusion: The demand notices and consequential appellate and revisional orders were quashed, and the assessee was held entitled to refund of the duty collected under protest.

Ratio Decidendi: A departmental exemption issued under Rule 8 must be construed according to its own language, and a duty demand arising from departmental error or misconstruction falls within Rule 10 rather than the residuary Rule 10A, with the limitation running from when the duty ought to have been paid.

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