"We are not questioning parliamentary supremacy; but an elected government cannot be sans any power," Mr Subramaniam told the court.
Last year, the High Court ruled that Delhi, as a union territory, is mainly in the charge of the Lieutenant Governor, who is the centre's representative in the national capital.
Chief Minister Arvind Kejriwal and his AAP have repeatedly accused the Lieutenant Governor of encroaching on the state government's powers and blocking its decisions.
Mr Subramaniam referred to Article 239AA of the constitution, which gave special status to Delhi while placing it under the administrative control of the Lieutenant Governor. The article also said the national Capital Territory has a legislative assembly with powers to make laws but control over police, law and order and land would stay with the centre.
The AAP government had in February told the Supreme Court that it has exclusive executive powers on matters within the ambit of the Legislative Assembly and "neither the Centre nor the President or the Lieutenant Governor can encroach upon these." The constitution has given a face and identity to a government in Delhi with Article 239AA and the executive decisions taken and implemented by it cannot be reversed by the Lieutenant Governor, it had said.
In December last, the court observed that the Delhi government should have some powers, otherwise it cannot function while hearing the appeals of the city government.