Section 6(2)(b) CGST: Delhi High Court Clarifies Parallel Inquiries and the 'Same Subject Matter' Test

In landmark indirect tax rulings delivered in 2026, a Division Bench of the Delhi High Court (in Vertilink Media Solutions Private Limited v. Commissioner and Star Traders v. Commissioner of Central Goods and Services Tax, W.P.(C) 4120/2026 & connected matters), established clear legal jurisprudence defining the boundaries of dual investigations under Section 6(2)(b) of the Central Goods and Services Tax (CGST) Act, 2017. Resolving persistent disputes over overlapping jurisdiction between Central authorities (including DGGI) and State GST enforcement directorates, the Court delineated when parallel proceedings are statutorily prohibited and when they are legally permissible.

"The bar under Section 6(2)(b) of the CGST Act is attracted only when the proceedings initiated by the two wings of the tax administration pertain to the very same subject matter. The mere fact that the assessee is identical, or that the inquiry relates to the same tax period, does not ipso facto establish that the subject matter of the proceedings is the same."
— Delhi High Court in Vertilink Media Solutions (Division Bench)

This judicial formulation brings vital clarity to businesses, corporate legal counsel, and tax professionals who frequently face simultaneous notices, audit letters, and summonses from both Central and State tax enforcement wings.

The Facts

The controversy originated from recurring dual proceedings initiated against registered dealers across the National Capital Territory of Delhi:

1. State Audit and Scrutiny: The petitioners, registered taxable entities assigned administratively to the State GST administration (AVATO/Ward Officers), received scrutiny intimations in Form GST ASMT-10 and audit notices under Section 65 regarding discrepancies in turnover between Form GSTR-1 and Form GSTR-3B for relevant financial years.
2. Subsequent Central Investigation: While the State reconciliation proceedings were pending (or after an order under Section 73 had been issued by the State officer), the Directorate General of GST Intelligence (DGGI) or Central GST Commissionerate issued summonses under Section 70 and Show Cause Notices under Section 74.
3. Distinct Scope of Inquiry: The Central proceedings were triggered by specific intelligence inputs alleging that the petitioners had availed fraudulent Input Tax Credit (ITC) from fictitious, non-existent supplying entities or circular trading syndicates.
4. Writ Challenge under Article 226: The taxpayers petitioned the High Court, asserting that once the State GST authority had initiated scrutiny or adjudication for a tax period, Section 6(2)(b) imposed an absolute bar prohibiting Central officers from initiating any inquiry for the same period.

The Law

The adjudication centered on the constitutional architecture of dual GST administration and statutory cross-empowerment:

• Section 6(1) (Cross-Empowerment): Grants concurrent powers, providing that the officers appointed under the SGST Act or UTGST Act are authorized to act as proper officers under the CGST Act, subject to statutory conditions.
• Section 6(2)(b) (The Dual Proceedings Bar): Explicitly stipulates that where a proper officer under the SGST or UTGST Act has initiated any proceeding on a subject matter, no proceeding shall be initiated by the proper officer under the CGST Act on the same subject matter.
• CBIC Clarification Guidelines (Letter F. No. CBEC-20/10/07/2019-GST): Directs that if an officer of one administration initiates an intelligence-based enforcement action against a taxpayer assigned to the other administration, that officer shall complete the proceedings, avoiding concurrent parallel harassment.

Arguments

1. Petitioner Contentions

Senior Counsel for the assessees argued:

• Statutory Bar: Section 6(2)(b) uses mandatory negative phrasing ("no proceeding shall be initiated"). Once the State authority assumed jurisdiction over the tax returns of the relevant fiscal period, Central authorities were divested of jurisdiction.
• Harassment and Double Jeopardy: Forcing a taxpayer to produce books of accounts, ledgers, and bank statements before both Central and State authorities simultaneously violates principles of natural justice and Article 19(1)(g).
• Doctrine of Priority: The authority that first initiates an inquiry holds exclusive competence to investigate all tax aspects for that tax period.

2. Revenue Contentions

Counsel representing the Central GST and DGGI contended:

• Difference in Subject Matter: A routine desk-based reconciliation of turnover (GSTR-1 vs. GSTR-3B) or general scrutiny under Section 61 is fundamentally distinct from an intelligence-backed investigation into organized fake invoicing and circular trading under Section 74.
• Public Interest and Evasion Detection: Interpreting Section 6(2)(b) as an umbrella immunity would enable fraudulent operators to escape major anti-evasion actions merely by pointing to an open routine query before a local ward officer.
• Strict Interpretation of Subject Matter: The phrase "subject matter" refers to the specific transaction, invoice, or statutory violation, not the broad taxpayer identity or general financial year.

3. Court Analysis and Distinction

The Division Bench analyzed the statutory architecture:

• The Court rejected the taxpayer's argument that "same subject matter" is synonymous with "same tax period" or "same assessee."
• To attract the statutory prohibition under Section 6(2)(b), the taxpayer must establish that the foundational facts, specific transactions, and allegations in both proceedings are identical.
• Where one proceeding concerns general reconciliation and the other concerns specific fake invoices or clandestine removals, the proceedings operate in distinct spheres and are legally permissible.
• However, if both authorities seek to recover tax on the exact same invoice, transaction, or classification dispute, the subsequent proceeding is barred and void ab initio.

Comparative Assessment: When Section 6(2)(b) Bars Proceedings vs. When It Does Not

The Decision

The Delhi High Court established the following binding principles governing Section 6(2)(b):

1. The 'Same Subject Matter' Standard: The jurisdictional bar under Section 6(2)(b) is transaction-specific, not assessee-wide. To claim statutory immunity, the assessee must demonstrate complete congruence between the allegations and transactions in both proceedings.
2. No Blanket Shield Against Anti-Evasion: A pending routine scrutiny (ASMT-10) or audit by a State officer does not grant immunity against intelligence-based investigations conducted by the Central GST or DGGI.
3. Protection Against Double Jeopardy: The Court reaffirmed that while parallel investigations into distinct infractions are permissible, no taxpayer can be subjected to duplicate recovery or double penalty on the same transaction.
4. Appropriate Forum for Factual Disputes: Where a dispute exists regarding whether the subject matter is truly identical, the assessee must place the facts on record before the adjudicating authority. Writ jurisdiction under Article 226 will not be used to prematurely abort investigations where the subject matters appear distinct on facts.

Practical Strategy for Taxpayers Facing Parallel Proceedings

When your enterprise receives notices from both Central and State GST authorities:

1. Map the Scope of Each Notice: Compare the annexures, Form DRC-01A, or summons questions. Determine whether both authorities are examining the same supplier, invoice series, or legal issue.
2. Submit a Detailed Jurisdictional Representation: If there is genuine overlap on the exact same transactions, immediately file a formal reply citing Section 6(2)(b) and the Delhi High Court ruling in Vertilink Media Solutions, requesting the subsequent authority to transfer the file to the initiating officer.
3. Maintain a Verified Submission Dossier: Keep stamped acknowledgments of all documents submitted to the first authority to demonstrate that the issue is already under active adjudication.
4. Avoid Non-Appearance in Summons: Never ignore a Section 70 summons from Central authorities under the pretext of Section 6(2)(b). Attend through an authorized representative, present the jurisdictional objection in writing, and establish your bona fides on record.

Related Resources

Conclusion

The Delhi High Court's rulings on Section 6(2)(b) establish a vital balance in indirect tax jurisprudence. While safeguarding the state's prerogative to investigate organized evasion and fake billing rings, the decision ensures that honest businesses are protected from duplicate recovery on identical transactions. Taxpayers facing dual inquiries must evaluate their notices through the "Same Subject Matter" test to determine the appropriate legal defense.