I have a few issues ...
1. If the line item is a contract line item , the PO should be released automatically
2. If the PO has a WBS element , then the PO should be released automatically
3. If the PO has atleast one line item which needs to go through PO release strategy, then the whole PO has to go through the release strategy.
If you don't mind, please give detailed expanation as to how I can accomplish the task.