service bond

I have been working with a central government psu for the last 3.5 years wherein I have a service bond for 5years.Recently I got selected in state Bank whichI have applied through proper channel.My present employer is asking me to pay the bond amount for getting the discharge certificate. But as per the dpe guideline,can i transfer the bond to state bank?Bank officials are telling,dpe guideline is not applicable to banking institutions.Is it like that?Pl. guide me on this issue. https://dpe.nic.in/important_links/dpe_guidelines/personnel_policies/glch2dindex/glch02d31