Question on assigning the BSV's to LE vs Ledger

Summary:

We have One Ledger, One BU and Multiple LE's. we have multiple BSV's and each of them are assigned to individual LE's and a few BSV's are assigned to Ledger for recording non LE related journal entries and adjustments.

per my knowledge, if a BSV is assigned to an LE, then when we are entering an AP Invoice after an LE has been chosen, system should allow only the BSV assigned to the LE and the BSV's assigned to the ledger to be picked up as a company segment on the charge account of the invoice. system will throw an accounting error if any other balancing segment value (which is assigned to another LE) has been selected.