'ByPass' all approvals for an employee

Hello All,

We are on EBS 12.1.3 version, we have a requirement that one of the dept. head is leaving the org soon, and users would like to bypass all his approvals i.e PO/Req/ECO/Move Orders etc to another employee. I am thinking of setting up vacation rules but, will it work even after inactivating the employee and user? Need your inputs on how to handle this case. Also i noticed that PO Approval type is not seen in item types when i was looking to setup vacation rules, is there anything which i need to look into? Any inputs on this is