Are Dynamic Routing Rules invoked when a human task expires?

We have a 4 step approval process, where only the first step needs to have escalation. If I enable escalation, by default it applies to all 4 steps, which will not work for us. I know I can separate these into different human tasks, but this is for OIM approvals, and the OIM screens are not designed to handle multiple approval tasks in one bpel process. So I was hoping to write a Dynamic Rule, where if the previous outcome is expired (or maybe it has to be the task state), and the