Expenditure items and events on billing hold

Hi,

In day to day activities, business keep all the events and majorly expenditure items on billing hold manually.

Based on the invoicing requirements, PM inputs invoicing team manually removes the hold on particular expenditure items/events and generates draft invoices.

Expenditure items are getting interfaced from different standard and custom sources.

Events are uploaded via custom component and sometimes manual event creation.

The requirement is to keep all the expenditure items on bill hold by default when interfaced to PA table.

Same applies to events to as well.

Please share inputs to achieve this.

Thanks in advance for the reply.