How can effective date control be enforced in Budgetary Control?

Summary:

Client wants to enforce effective date control in Budgetary Control when their control budget is utilizing an annual calendar. If in period 3 there is insufficient funds available and an amendment is posted to provide additional funds in period 4, can that amendment be made to only be effective in period 4 and future periods. It is their belief that funds should not be made available prior to the approval by the governing body and nor should funds be back dated.

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Version (include the version you are using, if applicable):

Client is currently using version 24C of Fusion Cloud.