Principal Secretary to the Prime Minister of India the Government of India—was established after independence under the prime ministership of Jawaharlal Nehru, as a successor to the office of the Governor-General of India's secretary. Lal Bahadur Shastri appointed Lakshmi Kant Jha, an Indian Civil Service officer, as his secretary, making Jha the first secretary to the Government of India-ranked officer in the PMS. During Indira Gandhi's tenure as prime minister, the post of Principal Secretary to the Prime Minister was created; retired Indian Foreign Service officer P. N. Haksar became the first PS to the PM. The Principal Secretary to the Prime Minister of India acts as the
Prime Minister of India in terms of the "Government of India (Allocation of Business) Rules, 1961". The coordinating work is generally allocated to the Cabinet Secretariat. While the work of the government is generally divided into various Ministries, the prime minister may retain certain portfolios if they are not allocated to any member of the cabinet. The prime minister—in consultation with the cabinet—schedules and attends the sessions of the houses of parliament and is required to answer the question from the Members of Parliament to them as the in-charge of the portfolios in the capacity as Prime Minister of India. Some specific ministries/department are