Business Auxiliary Service classification requires a specific statutory limb and evidence of the alleged taxable activity.

Business Auxiliary Service requires proof that liaison activities fall within a specific statutory limb, such as promotion, marketing, procurement, customer care, service on behalf of a client, commission agency, or an incidental specified activity. Receipt of liaison charges or expense reimbursements alone does not establish taxability. A show cause notice must identify the precise limb invoked where the definition contains distinct taxable categories; reproducing the entire definition without a specific charge is vague and impairs an effective defence. A service-tax demand also requires cogent evidence of the alleged taxable activity and cannot rest on presumptions arising from liaison charges.

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Issues: (i) Whether liaison charges were classifiable as Business Auxiliary Service; (ii) Whether the show cause notice was sustainable without identifying the applicable limb of the definition of Business Auxiliary Service; (iii) Whether the service-tax demand was sustainable on merits.

Issue (i): Whether liaison charges were classifiable as Business Auxiliary Service.

Analysis: Business Auxiliary Service comprises distinct and separately defined taxable activities. The record did not establish that the liaison charges related to promotion or marketing of a client's goods or services, procurement, customer care, provision of service on behalf of a client, commission agency, or any incidental activity linked to those specified services. Mere collection of liaison charges or reimbursement of expenses does not by itself establish a taxable Business Auxiliary Service.

Conclusion: The liaison charges were not shown to be classifiable as Business Auxiliary Service; this issue was decided in favour of the assessee.

Issue (ii): Whether the show cause notice was sustainable without identifying the applicable limb of the definition of Business Auxiliary Service.

Analysis: The notice reproduced the full definition but did not disclose the precise statutory sub-clause under which the alleged activity was proposed to be taxed. As each limb creates an independent taxable category, failure to state the exact charge deprived the assessee of an effective opportunity to defend and rendered the foundational notice incurably vague.

Conclusion: The show cause notice was defective and could not sustain adjudication; this issue was decided in favour of the assessee.

Issue (iii): Whether the service-tax demand was sustainable on merits.

Analysis: Revenue produced no cogent evidence that the appellant performed any activity falling within the defined scope of Business Auxiliary Service. Taxability could not rest on a presumption arising merely from receipt of liaison charges, and Revenue did not discharge its burden to establish the taxable service.

Conclusion: The demand was unsustainable on merits; this issue was decided in favour of the assessee.

Final Conclusion: The impugned tax liability, together with the related interest and penalties, lacked a valid legal foundation.

Ratio Decidendi: Where a composite taxable-service definition contains distinct statutory limbs, a show cause notice must identify the precise applicable limb, and a demand cannot be sustained without that specific charge and evidence establishing the alleged taxable activity.

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