Upon the issue of a notification by the Central Government that a foreign country is—

(a) a country which is committing external aggression against India; or

(b) a country assisting the country committing external aggression against India; or

(c) a country where armed hostilities are in progress; or

(d) a country to which travel must be restricted in the public interest because such travel would seriously impair the conduct of foreign affairs of the Government of India.