Principal Secretary to the Prime Minister of India Principal Secretary to the Prime Minister of India The Principal Secretary to the Prime Minister of India (PS to the PM; IAST: ) is the senior-most bureaucrat in, and the administrative head of, the Prime Minister's Office. The officeholder is generally a civil servant, commonly from the Indian Administrative Service and occasionally from the Indian Foreign Service. The post is considered one of the most influential in the Indian civil services, and some principal secretaries are considered more powerful and influential than senior government ministers. The Prime Minister's Secretariat (PMS)—headed by an officer of the rank of joint secretary to
Council of Civil Service Unions v Minister for the Civil Service While the use of the Royal Prerogative for national security reasons is considered outside the scope of the courts, most other uses of the Prerogative are now judicially reviewable in some form. The GCHQ case also confirmed that non-legal conventions might be subject to "legitimate expectation". A convention would not have usually been litigible, and it was necessary for the court to demonstrate that it was in the present case: such a rule had been established in respect of Cabinet conventions in "Attorney General v Jonathan Cape Ltd". Although the court ruled against the union, it was accepted that the