Basic duty on raw silk: exemption limits customs duty to a prescribed ad valorem minimum, modifying levy application.
The Central Government, using powers under section 25(1) of the Customs Act, 1962, exempts raw silk under First Schedule heading 50.02 from customs duty to the extent that duty in excess of the prescribed ad valorem rate specified in the First Schedule shall not be leviable, thereby limiting the effective basic duty on raw silk imports as a public interest tariff exemption.

Concession on import of raw wool extended to Khadi and Village Industries entities and State boards under customs amendment.
Amendment under the Customs Act, 1962 replaces the beneficiary phrase in Notification No. 17/88 Customs to extend the import concession on raw wool by expressly including Khadi and Village Industries Commission and State Khadi and Village Industries Board alongside registered apex handloom co operative societies and State handloom development corporations.

Customs duty on glazed newsprint converted from specific rate to ad valorem rate, altering tariff application.
Amendment converts the duty on glazed newsprint in Notification No. 28/87-Cus by substituting the specified per tonne charge in item (i) with an ad valorem duty, effected by the Central Government under its executive customs powers as necessary in the public interest.

Customs exemption rates for specified polycarbonates and related polymers capped to limit duty liability on import.
The Central Government exempts specified goods under Chapter 39 from basic customs duty in excess of the amount computed at the rates specified in the notification's Table, thereby capping duty liability for listed polymeric products. The Table lists polyphenylene oxide (including chemically modified forms), polyacetals, and polycarbonates and prescribes an ad valorem rate for each as the benchmark for the exemption; a proviso preserves any existing exemptions under other notifications.

Exemption cap on customs duty for specified polymer and resin imports limits payable duty to prescribed rates on import.
The Central Government exempts Chapter 39 imports from that portion of basic customs duty in excess of amounts calculated at the specified ad valorem percentages or specific per weight rates for listed polymers, resins, cellulose acetate products, acrylic scrap and related goods, thereby capping payable duty for each listed item at the stated rate while leaving other in force notification exemptions unaffected.

Customs exemption amendment adds life saving drugs to the schedule and narrows equipment coverage by excluding Foley balloon catheters.
Amendment to the customs exemption notification adds specified life-saving drugs to the Schedule of exempted medicines and revises the life-saving equipments heading by omitting item 1, removing "Butterfly needle G., Infusion set;" from item 44, and inserting an exclusion that items under the equipments heading do not include Foley balloon catheters.

Customs amendment expands exempted drug intermediates and inputs, adding specified chemical precursors for pharmaceutical manufacture.
The Central Government, invoking section 25 of the Customs Act, amends an existing customs exemption notification by substituting a tariff heading reference and inserting and substituting multiple serial entries in the notification table. The amendments add specific chemical precursors, reagents and intermediates linked to the manufacture of named pharmaceuticals, thereby expanding and specifying which inputs qualify for the customs exemption for drug intermediates and related materials.

Rescission of customs exemption notifications under statutory power withdraws prior exemption orders in the public interest.
The Central Government, satisfied that it is necessary in the public interest, rescinds specified customs exemption notifications under sub-section (1) of section 25 of the Customs Act, 1962. The notifications rescinded are No. 168/76-Customs (2 August 1976), No. 158/77-Customs (15 July 1977) and No. 51/87-Customs (1 March 1987), recorded in Notification No. 44/89-Cus. dated 1 March 1989.

Customs tariff amendment increases prescribed ad valorem rate and extends validity of specified exemption notification.
Pursuant to section 25(1) of the Customs Act, 1962, Notification No. 136/86-Cus. is amended by substituting the Table entry against S.No. 58B in column (4) with a new ad valorem rate of 45%. Notification No. 251/86-Cus. is amended in paragraph 2 by substituting the existing expiry date with a later date, thereby extending the notification's period of operation.

Customs duty amendment updates exemption notifications, modifies ad valorem rates, inserts insulin crystals and extends expiry.
Eight existing customs exemption notifications are amended to substitute or omit clauses, table entries and schedule items: specified ad valorem rates are increased, one combined specific plus ad valorem charge is raised, an entry for insulin crystals is inserted, certain schedule items are substituted or removed, and a notification's concession expiry is extended by one year, thereby altering which duties are exempted or requalified under the cited notifications.

Customs ad valorem exemption thresholds revised, amending multiple exemption notifications and extending specified notification expiry dates.
Customs ad valorem exemption thresholds are revised by the Central Government under section 25 of the Customs Act, 1962, by amending six existing exemption notifications through textual substitution: replacing prescribed ad valorem benchmarks or clause wording to limit exemption to the portion of duty in excess of a stipulated ad valorem rate, and in one case extending the notification's terminal date.

Exemption from customs duty for specified amino acids permits preferential import treatment where used in poultry feed manufacture.
The Central Government exempts imports of amino acids L Lysine and DL Methionine for manufacture of poultry feeds by capping the basic customs duty at a specified ad valorem rate and waiving the additional duty otherwise leviable, under powers granted by the Customs statute.

Customs duty exemption for imported X ray phosphor permits reduced duty rate on imports for manufacture of intensifying screens.
The Central Government exempts X ray phosphor, classifiable under Chapter 28 or Chapter 32 of the First Schedule to the Customs Tariff Act, when imported into India for manufacture of X ray intensifying screens, from so much of the basic customs duty specified in the First Schedule as exceeds 45 per cent ad valorem.

Customs duty exemption on cubic boron nitride reduces basic duty for imports used in abrasive tool manufacture.
Exemption under sub-section (1) of section 25 of the Customs Act, 1962 reduces the basic customs duty on imports of cubic boron nitride (Chapter 28) used in manufacture of grinding wheels and cutting tools by exempting that portion of duty which exceeds 40 per cent ad valorem, thereby providing a use-based concession for specified manufacturing inputs.

Duty exemption for silicon carbide and synthetic aluminium oxide reduces effective customs burden where imports are for abrasive manufacture.
The Central Government exempts silicon carbide and synthetic aluminium oxide, including zirconia aluminium oxide, when imported for manufacture of grinding wheels and other abrasive products, from that portion of basic customs duty specified in the tariff which exceeds 40 per cent ad valorem, thereby linking reduced duty treatment to tariff classification and declared end-use.

Exemption from basic customs duty limits payable duty on imported zinc ash by capping the duty per tonne.
Exemption from basic customs duty on zinc ash is granted by statutory notification, limiting the basic duty payable so that duty is not leviable in excess of a prescribed amount calculated on a per tonne basis, thereby capping the duty payable on importation rather than creating tariff free status.

Customs amendment: substitution of tariff description to "Residues of zinc (including dross)" under delegated powers.
The Central Government, exercising powers under sub section (1) of section 25 of the Customs Act, 1962 and invoking public interest, amends Notification No. 493/86 Customs by substituting in the Table at S. No. 3 the column (3) entry with the description "Residues of zinc (including dross)", thereby changing the tariff/exemption description attached to that serial entry.

Exemption from customs duty on low-ash coking coal limits duty to 5% ad valorem and waives additional duty.
Imported coking coal of ash content below 12% falling under Chapter 27 is exempted from customs duty in excess of an amount calculated at 5% ad valorem and from the whole of the additional duty levied under the Customs Tariff Act, the exemption being granted by the Central Government under statutory power in the public interest.

Tariff exemption for low phosphorus coke caps payable customs duty to specified ad valorem rate on import.
Exemption caps customs duty on qualifying coke imports: coke with phosphorus content of 0.035% and below is exempted from any portion of duty exceeding the amount calculated at a 20 per cent ad valorem rate, exercising powers under the Customs Act to limit duty liability on that tariff classification.

Additional duty exemption limits extra customs duty on specified alcoholic beverages to notified per litre rates.
The Central Government limits additional customs duty on specified Chapter 22 goods by exempting amounts in excess of the per litre rates set out in the annexed Table for each listed tariff sub heading. The Table prescribes per litre rates for various wines, sparkling wines and related goods, while several sub headings are assigned a nil additional duty, so importers' liability is capped at the notified rates tied to sub heading classification.