law: Emigration Act, 1983
  31. Power to prohibit emigration due to
  
  outbreak of epidemics, civil disturbances, etc., in a country, -
  (1) Where the Central Government has reason to
  
  believe, that intending emigrants if allowed to emigrate to any country
  
  would be exposed to serious risk to life on arrival there by reason of- (I)
  
  outbreak of any disease or grave pollution of environment in such country,
  (ii) Outbreak of hostilities or civil war or
  
  civil commotion or political disturbances, that by reason of India not being in
  
  diplomatic relations with that country it is not possible to protect the
  
  emigrants from discrimination, maltreatment and exploitation, it may, by
  
  notification, prohibit emigration to that country.
  A notification issued under sub section (1)
  
  shall have effect for such period mot exceeding six months as may be specified
  
  in the notification :
  Provided that if the Central Government has
  
  reason to believe that any ground mentioned in sub section (1) continues to
  
  exist, it may, from time to time, by notification, prohibit emigration to that
  
  country for such further period, not exceeding six months on each occasions ,
  
  as may be specified in the notification