This question refers to the new penal code, the Bharatiya Nyaya Sanhita (BNS), 2023.
The offense of voluntarily causing grievous hurt by use of acid is covered under Section 118(2) of the BNS.
This section provides for a stringent punishment to deter such heinous crimes.
The prescribed punishment is imprisonment for a term which shall not be less than ten years, but which may extend to imprisonment for life, and with fine.
Therefore, the minimum punishment is 10 years of imprisonment.