Auditor Approval

Hi Team,

We have a requirement saying above 1000$ should go to auditor approval and below 1000$ shouldn't go to auditor approval. We have set up a threshold limit to 1000$ under audit rules setup where the expense is going for auditor approval for both above and below 1000$.Can any one help us out with is there any rule or setup to avoid below 1000$ not to go for auditor approval.

Thanks,

Neeharika.