Need to call Special Purpose Ledger Validation from PCA Allocations

All,

We have a Special Purpose Ledger Validation in place (config menu path SPRO > Financial Accounting > Special Purpose Ledger > Basic Settings > Maintain Local Validation) which validates the profit center entered when a PCA local document is created. It works perfect for the manual PCA document but is NOT getting called by PCA allocations (assessments - trans 3KE5 or distributions - trans 4KE5).

Does anyone know how to get a PCA allocation to go through a validation (or substitution for that matter) OR how to get a PCA allocation to call a user exit where we can perform such logic.

Thank you,

Vicki