This rule is already existing.
I would like to add more that mostly PRS clerk doesnt accept such requests. He keeps saying all times to go to the main station for change of names or other stuff.
For ex: ( In hyderabad there are several PRS in MMTS local stations)
The requests are not accepted and they want such cases to be diverted to...
more... SC/HYD/KCG/Maitrivanam PRS only.
When contacted thru email to IRCTC, they said that request has to be accepted at every PRS.
I have taken the print out of the mail and then also it didnt work. :(