How often such challenges by the federal government arise is another question.

After all, life does not stand still and new challenges will certainly arise.

Because of its long history as both a church and a mosque, a particular challenge arises in the restoration process.

Regulatory challenges arise at the federal, state and municipal levels.

Safety at sea is a continuing debate that will never be closed, because new challenges can always arise.

A similar challenge for Japan may now be arising in high-definition television.

We must face up to the new challenges arising in the context of cohesion policy.

The challenge arises from the fact that the Government is considering turning the day-to-day running of the social security system over to agencies.

Depending on the continent to be crossed, different challenges arise.

In 1197, the most serious challenge to Sverre's kingdom arose.