Whenever it shall appear in the City of Bangalore and other areas for which a Commissioner has been appointed under section 7 to the Commissioner, and in other area or areas to which the Government may, by notification in the official Gazette, extend the provision of this section, to the District Magistrate, or the Sub-Divisional Magistrate having jurisdiction and specially empowered by the Government in that behalf,—

(a) that the movements or acts of any person are causing or calculated to cause alarm, danger or harm to person or property, or

(b) that there are reasonable grounds for believing that such person is engaged or is about to be engaged in the commission of an offence involving force or violence or an offence punishable under Chapter XII, XVI or XVII of the Indian Penal Code, or in the abetment of any such offence, and when in the opinion of such officer witnesses are not willing to come forward to give evidence in public against such person by reason of apprehension on their part as regards the safety of their person or property, or

(c) that an outbreak of epidemic disease is likely to result from the continued residence of an immigrant,