Single-window systems exist; a single window does not mean a single approval. Each regulator runs its own clock, its own evaluation logic, its own concurrence chain.
The Indian regulatory environment yields a continuous stream of instruments, each carrying different legal weight, each capable of reshaping a company's obligations overnight. A CBIC circular can reclassify a product. A BIS Quality Control Order can determine whether it enters the market at all. An NPPA notification can compress margins through a single pricing cap. The cross-sectoral architecture, CCI on competition, SEBI on listed disclosures, RBI on payments and capital, runs concurrently with sector-specific regulators that often impose different requirements on the same transaction.