Actual Budget Consumption on F-48

Dear Experts,

In our scenario, where Down Payment to Vendor (F-48) is made in FI (no MM in place, FM-BCS is active), following accounting entry is generated:

Dr Vendor Recon A/c

Cr Bank Outgoing G/L

Since both above line items are Balance Sheet items, how FM would act to trigger the budget availability controls?

Client has requirement that Actual Budget must be checked and consumed at time of posting of F-48.

Please guide. Regards