hearing but even cross-examination of witnesses is treated as necessary concomitant of the principles of natural justice. Likewise, in service matters relating to major punishment by way of disciplinary action, the requirement is very strict and full-fledged opportunity is envisaged under the statutory rules as well. On the other hand, in those cases where there is an admission of charge, even when no such formal inquiry is held, the punishment based on such admission is upheld. It is for this reason, in certain circumstances, even post-decisional hearing is held to be permissible. Further, the Courts have held that under certain circumstances principles of natural justice may even be excluded by reason of diverse factors like time, place, the apprehended danger and so on."