Professional Footballers' Association CEO Gordon Taylor has claimed there is "hidden racism" in football when it comes to appointing black managers.
The rule is named after Dan Rooney, the ex-Pittsburgh Steelers president, who abided by giving leadership opportunities to African Americans.
"I don't know how it could be hidden. You have 92 clubs, you have two coaches of colour," said Webb.
"How many board members or executives are in various club positions or at the FA, in UEFA? So, it's not hidden.
"It's hidden from a discussion standpoint. No-one wants to deal with it. No-one wants to deal with it from a commercial standpoint."
Out of the 92 clubs in England's top four football divisions, only two employ a black manager with Chris Powell in charge at Huddersfield and Keith Curle in the Carlisle United hot seat.
"It has to come within. It has to come from the clubs. It has to start with clubs. It has to start with ownership," he added.
"How many American owners do we have from English Premier League clubs in the UK?
"So, why have certain standards here and then, of course, in the US, in the NFL leagues, where you live, where you conduct business, you live by different standards? Why?
"If it's good there, why wouldn't it be good here?"
