Empanelment:It is specifically for the govt audit work. In this, member need to file the tender or apply for the audit assignment provided any panel is open, if the panel is not open and the member is asking for the audit assignment or inquiring about the same then it will considered as professional misconduct and liable under clause (vi) to part-I to first schedule of Chartered Accountants Act,1949.
Audit: It wolud mean the simple audit work which the you can get by any refernce or your contacts from another CA. It would cover the catagories other then govt.
If you want to get the audit assignment work being a member of ICAI, then you can give classified advertisement in the institute journal.