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.

Substitution of term in central excise notifications: textual correction replaces 'unhardened' with 'unhard' across listed exemptions.
Amendment under section 5A directs a uniform textual substitution in specified Central Excise notifications: replace the term "unhardened" with "unhard" wherever it appears, implementing a linguistic correction across listed tariff exemption notifications without introducing new eligibility criteria or altering exemption structure.

Excise concession: foam rubber lubricating pads supplied to Indian Railways exempted beyond a concessional ad valorem rate.
The Central Government, exercising its statutory exemption power under the Central Excises regime, exempts foam rubber lubricating pads under sub heading 4016.11 supplied to Indian Railways from any excise duty exceeding the amount calculated at a concessional ad valorem rate, the concession being granted in the public interest and contingent on the goods' tariff classification and intended use by Indian Railways.

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.

Excise duty exemption for specified plastic articles caps levy to a stated ad valorem rate; excess is exempted.
Exempts specified plastic articles under Chapter 39 from excise duty to the extent that duty exceeds the amount calculated at 15 per cent ad valorem; applies to an enumerated list of household and serving plastic goods, thereby capping the effective levy for those goods.

Excise tariff amendments reduce ad valorem duties and convert certain rates to specific duties, altering exemptions.
Amendments revise Central Excise exemption schedules by reducing certain ad valorem duties, substituting specific duties for some items, reorganising tariff headings and descriptions for vinyl chloride polymers and related goods, inserting new schedule entries, and imposing a monthly aggregate clearance limit on waste and scrap of flexible polyurethane foam measured as a proportion of the immediately preceding month's production.

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.

Effective duty rates on feature films revised, with exemptions for initial prints and timing-based clearance rules.
Amendment revises effective rates of duty by substituting tariff entries to specify schedules for feature films (not exceeding 4000 metres), dubbed feature films (not exceeding 4000 metres) and advertisement/other films, distinguishing clearances before or within twelve months of first public exhibition and those after twelve months, and providing nil or reduced duty for initial prints and higher rates for subsequent prints and balances.

Effective duty rates for mechanised match manufacture revised, prescribing specific duties by pack size under Central Excise notification.
The Central Government, invoking sub-section (1) of section 5A, amends notification No.116/85-Central Excises by substituting the existing Table with a new schedule of effective rates of duty for matches manufactured in the fully mechanised sector, specifying pack-size differentiated duties per gross box for matches packed in boxes of fifty and three hundred matches, issued as Notification No.35/89-C.E. dated 1-3-1989.

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.

Excise rate amendments reduce specified exemption amounts and substitute ad valorem rates with specific per unit tariffs.
The Central Government, exercising executive amendment power under the Central Excises and Salt Act, directs textual substitutions in six notifications: reducing specified per gross box charges for matches, lowering an ad valorem charge from thirty five to thirty percent, omitting and replacing certain table entries (including new per vehicle figures for motor vehicles and auto rickshaws), and converting a fifteen percent ad valorem charge into a fixed per kilogram tariff. These changes amend the opening paragraphs and table column entries of the listed notifications.

Excise duty exemption for liquid nitrogen used in cattle semen processing and storage, subject to Assistant Collector certification.
Exemption from excise duty is granted for liquid nitrogen used in processing and storage of cattle semen for artificial insemination, subject to satisfaction by the Assistant Collector of Central Excise that the liquid nitrogen is for that specified use.

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.

Excise exemption rates limit duty on specified tariff sub headings to prescribed effective rates under delegated excise power.
The Central Government, invoking powers under sub section (1) of section 5A of the Central Excises and Salt Act, 1944, exempts goods under specified tariff sub headings from that portion of excise duty exceeding the amounts calculated at the effective rates set out in the annexed Table, which prescribes discrete per unit effective rates for each listed sub heading.

Excise duty exemption for steam, black liquor and bleach liquor removes levy under the Central Excise Tariff Act.
The Central Government, invoking its power under section 5A of the Central Excise and Salt Act, exempts specified goods from the whole of the excise duty leviable under the Schedule to the Central Excise Tariff Act. The annexed Table lists steam (Chapter 28), black liquor (Chapter 28 or 38) and bleach liquor (heading 28.28) and directs that the duty specified in the Tariff Schedule for those entries shall not be levied.

Customs exemption limits duty on specified Chapter 15 imports to prescribed effective ad valorem rates under the Customs Act.
The Central Government exempts specified imported goods under Chapter 15 from customs duty to the extent that duty exceeds the amount calculated at the ad valorem rate specified in column (4) of the Table annexed; the exemption caps the duty payable for each First Schedule tariff sub heading at the effective ad valorem rate shown and distinguishes classifications (for example, rapeseed oil versus other goods) where different rates apply.