Tariff exemptions expanded for specified manufacturing inputs, with conditional undertakings and certificate based compliance required. Amendment expands concessional tariff entries by inserting new headings and goods for manufacture (including chemical inputs, catalytic converter components, silicon and solar related items, CNC systems, and inputs for syringes and needles), substitutes and omits certain table entries to update scope, and adds Condition 66A in the Annexure requiring an undertaking, post import certificate from central excise confirming use, and payment on demand of duty differential for non compliance.