Such a policy would require a change in federal law.

But this means that a change of approach is sometimes required too.

In some cases, state laws already have required such changes.

To do this will require a significant change in policy.

But that would require a change in the federal law.

To win a significant amount of new business would require a big cultural change at the company.

I see no reason why any radical changes are required.

The sort of major social change required has happened with smoking.

This will require changes in the way scientists report new knowledge.

He started to see that some minor changes would be required now.