it becomes valid till the 5 years from the date of registration.
and next march 2011, this scheme is expired , before it whenever the govt. of India issue the public notification / circulars you can get from the ca club India.
FOR MORE INFO:- http://www.infodriveindia.com/exim/dgft/exim-policy/2008/chapter_6_eous_ehtps_stps_btps.aspx#6.1