Its not possible to assign permit again as well as it will not have any effect after release of order.
Either, you have to control addition of new components or increasing the qty for existing components using development. Also, you can make user status which can be considered while restricting the components addition.
Keep 2 statuses as "Components addition not allowed" & "Components addition allowed". Keep "Components addition allowed" as initial status.
Once after release of the order, set "Components addition not allowed" automatically through business transaction.
Give authorization to specific people only for changing these user statuses. By that, you can have control.
Else, you can keep one more permit if planned cost is less than 100000 & actual cost is greater than 100000 at order completion.