icc.rules in cadence 6.1.7

Hi,

I am using virtuoso 617 to do the auto-route by chip assembly router. However, there are some drc errors. I found out online that designer can import icc.rules file to define minimum width and spacing at old version like viruoso 5141. However, I can locate a place where I can import icc.rules file at virtuoso 6.1.7. Can anybody help me or this version has automatically applied icc.rules?

Thanks