Power to commute a sentence rests with:

CrPC Section 433. Power to commute sentence—The appropriate Government may, without the consent of the person sentenced, commute: (a) a sentence of death, for any other punishment provided by the Indian Penal Code; (b) a sentence of imprisonment for life, for imprisonment for a term not exceeding fourteen years or for fine; (c) a sentence of rigorous imprisonment, for simple imprisonment for any term to which that person might have been sentenced, or for fine; (d) a sentence of simple imprisonment, for fine.