intercompany direct ship - Product allocation hold

HI there

I have a requirement for which I'm not sure how to do.

I'm working for an international company with multiple subsidiary.

We are using product allocation hold code (PA) to control sales.

Subsidiary's customers are grouped in customer group preferences as a customer group called Sales entity XXX, XXX being the name of the entity)

Subsidiary as a headquarter's customer belongs each one to a different customer group (purchase from subsidiary XXX).

Production allocation are entered at the purchase from subsidiary XXX level, not at the Sales entity XXX level.

Generic rule is that the order which is moving the inventory from the sourcing branch plant is holding the PA hold.