Hi,
In Hr we have a Concept Called Authorizations.Contact your Authorization team and Explain the Situation.This is a simple job for Authorizations,
Firstly they will create a Role==> and they will assign what that particular role has to do ...
For more Info Pls Check the existing thread http://scn.sap.com/thread/1659768
Thanks and Regards,
Srikanth Reddy M