As per change in rules, all the candidates who have qualified in the written part of civil services (main) examination, 2014 shall mandatorily indicate revised preferences of services for which he or she is interested to be allocated to.
The candidates will be required to fill up the revised services preferences and submit the same online as per the details or guidelines which will be available on the Commission's website shortly, the UPSC said in a statement.
The personality test of the successful candidates is likely to commence from April 27, it said.
"The first batch of e-Summon letter will be made available on the Commission's website www.Upsc.Gov.In latest by April 18, 2015. The second and third batches of the e-Summon letters would be uploaded subsequently," the UPSC said.
Successful candidates, who are unable to download their e-Summon letters from the website at least five days before the commencement of the personality test or interview, should immediately contact the Commission, it said.