When I request the insiders to complete the FFIEC 004, I also include a cover page that explains what else they need to disclose (beside the correspondent accounts). And it is included in the Reg O policy that goes to the BOD, but I have not seen a report either so I am thinking like you. You might just touch base with them also, if you have the chance (like if you are a smaller bank and actually know the EOs), you should include them in your Reg O training and make sure they understand it is their responsibility and what the penalties are for non-compliance on Reg O.