Events "Allow Adjustment" functionality

Summary: Can any restrictions be made to the "Allow Adjustments" functionality on events

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In our organisation we have a current business process (R12) where events are loaded with a billing hold, then mass released for billing. Looking at the options on events in fusion it appears that if we allow adjustments, then any adjustments can be made to the event at any stage, even after it's billed the amounts can be updated. Is there any way to control the adjustments so items can be only placed on or released from hold once created.

We would like the ability to still load as on hold, and be able to release as needed, but not have amounts updated.