Failure to perform official duties triggers criminal sanctions, including imprisonment or fine, absent permission or lawful notice. Failure by a Central Excise Officer to cease, refuse, or withdraw from duties without express written permission of the Commissioner (with amendment referencing the Principal Commissioner), or without two months' written notice to a superior or other lawful excuse, is a criminal offence punishable on conviction before a Magistrate by imprisonment, a fine measured by pay, or both.