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 to prove majority when instructed by the president. India follows a parliamentary system in which the prime minister is the presiding head of the government and chief of the executive of the government. In such systems, the head of state, or, the head of state's official representative (i.e., the monarch, president, or governor-general) usually holds a purely ceremonial position and acts—on most matters—only on the advice of the prime minister. The prime minister—if they are not already—shall become a member of parliament within six months of beginning his/her tenure. A prime minister is expected to work with other central ministers