Using CR Status in BRF Plus

Hi,

1. Can I use Change request status in BRF Plus rules? I would like to create a rule based on the status, how can I achieve it. I couldn't find any object related to it.

2. What is the significance of CHECK CHANGE REQUESTS in BRF Plus? I tried to create a simple rule in under this node, but couldn't see that gets executed. When does the rule against this node gets executed.

Thanks

Bala