How to Restrict Adding Absences While on LOA Status (Eligible Status)

We are currently reviewing how to prevent users from adding new absences while they are in a Leave of Absence (LOA) status. In our configuration, LOA is set as an eligible status in order to avoid inactivating the absence plan during the leave period.

However, we would like to restrict the ability to add additional absences while the employee remains in this LOA status.

Has anyone encountered a similar requirement or found a way to implement this restriction—either through configuration, fast formulas, or other workarounds?

Any insights or suggestions would be greatly appreciated.

Absence Redwood ESS and MSS

Regards,