Hmmm ... it seems there is some conflicting information.
In JLC's blog he provides a quote from the NFL briefing regarding the Rooney Rule:
"On the December 19-20 conference calls, the owners strongly agreed on the principle that any club seeking to hire a head coach will interview one or more minority applicants for the position. The one exception occurs when a club has made a prior contractual commitment to promote a member of its own staff and no additional interviewing takes place (e.g. Mike Martz and the St. Louis Rams in 2000)."
The Rooney Rule - Redskins Insider