If you are thinking of researching different financial opportunities in India, the OCE card will prove to be somewhat useful to you. However, you will have to make sure the country you wish to visit has a positive currency exchange coverage for expats. The OCE card is valid for a certain length of time and it expires. However, if you were planning to travel to a different country in the near future, you may think about extending your validity period so as to be able to stay longer in the country.