The Supreme Court of India, in a landmark judgment delivered on August 14, 2025, in the case of M/s Armour Security (India) Ltd. v. has provided crucial clarity on the interpretation of Section 6(2)(b) of the CGST Act”. This ruling addresses the persistent ambiguity surrounding the “initiation of proceedings” and “same subject matter” in the context of parallel investigations and/ or proceedings by the Central and State tax authorities. The Court dismissed the Special Leave Petition, upholding the High Court’s decision not to interfere with summons issued under Section 70 of the CGST Act.