Audit watches on NFS mounts

I noticed a weird behavior. I NFS mount /usr/local on my Redhat machines. If I put a watch for a directory in that NFS mount: -w /usr/local/mywatchdir/ -p rwxa -F exit!=-ENODATA -F success!=1 -k watch On Redhat 6.4, I don't see audit events when trying to remove or change files in that dir. On Redhat 6.8, I do see the audit events when trying to remove or changes files in that dir. Any ideas of possible features added to auditd between those releases? I would like to be able to speak to it for security audits.