How can Parliament modify the conditions of service of certain individuals under this article?
Under this article, Parliament can modify the conditions of service for certain individuals only to the extent that they are already applicable by reason of their appointment to a civil service of the Crown in India by the Secretary of State or Secretary of State in Council. This means that Parliament cannot vary or revoke the conditions of service for these individuals after their appointment, except in cases where such conditions are already applicable due to their appointment to a specific civil service.