excessive crond PAM messages in audit.log

I'm looking for a way to silence frequent messages attributed to crond in my audit.log files. Here is a snippet of the messages i would like to filter: type=*USER_ACCT* msg=audit(10/20/2009 16:10:01.608:10196) : user pid=30783 uid=root auid=unset msg='PAM: accounting acct=root : exe=*/usr/sbin/crond *(hostname=?, addr=?, terminal=cron res=success)' type=*CRED_ACQ* msg=audit(10/20/2009 16:10:01.608:10197) : user pid=30783 uid=root auid=unset msg='PAM: setcred acct=root : exe=*/usr/sbin/crond*(hostname=?, addr=?, terminal=cron res=success)' type=*USER_START* msg=audit(10/20/2009 16:10:01.612:10199) : user pid=30783 uid=root auid=root msg='PAM: session open acct=root : exe=*/usr/sbin/crond*(hostname=?, addr=?, terminal=cron res=success)' type=*CRED_DISP* msg=audit(10/20/2009 16:10:01.656:10200) : user pid=30783 uid=root auid=root msg='PAM: setcred acct=root : exe=*/usr/sbin/crond*(hostname=?, addr=?, terminal=cron res=success)' type=*USER_END* msg=audit(10/20/2009 16:10:01.656:10201) : user pid=30783 uid=root auid=root msg='PAM: session close acct=root : exe=*/usr/sbin/crond*(hostname=?, addr=?, terminal=cron res=success)' I literally get tens-of-thousands of these a day in my consolidated audit.log (via audisp-remote). All five of these events get dumped to the audit log every time crond is executed. The reasoning behind this is that some of my customers are under regulations that dictate security logs such as these are responded to and classified within a certain time frame. This is obviously a problem due to the frequency of these messages. I've looked over every associated PAM module and corresponding options with no luck. I also picked through as many auditd man pages i could find. The only thing i was able to dig up was the ability to 'exclude' certain message types with an audit rule. For example, I could exclude all USER_ACCT, CRED_ACQ, USER_START, CRED_DISP, and USER_END message types, however, that would weaken the overall security posture as some critical messages would get filtered. Any help would be greatly appreciated. Thanks! -Nick