If that fails, business leaders say, they will challenge the rules in court.

And it would provide new grounds for businesses to challenge the rules in court.

It's a space where challenging the normal rules of business is encouraged.

Within Russia, the oil executives are also challenging the rules, some more than others.

"You are not so old, my lord, and surely no one now would challenge your rule!"

A third approach would be for the administration to encourage industry lawsuits challenging the rules in court.

And they have suggested that they may challenge the rules in court.

Four years ago, the broadcasters brought a new lawsuit challenging the rules.

When I get rid of my brother, there will be no one to challenge my rule!

The companies had challenged the rules on 57 grounds.