R12 AME Set up for transactions to get rejected automatically

I would like to set up  an expense report where it's rejected automatically when it satisfied my criteria.  In  R12 AME,  I created a condition that validate if the exchange date is blank  and then attached to a condition to equal to True.  I think I need to have another setup for Action for this to trigger and I don't know what or where to set it up.  Once it satisfied the condition it gets rejected automatically and NOT go to the manager for approval. Thank you in advance for your input.

Redford