"If our customers can't voluntarily cut back over the next several weeks, then we'll have to go to more stringent regulations."

"Some towns wanted to come up with stringent regulations," he said.

The Navy has said that it will present new, less stringent regulations.

We need to have stringent environmental regulation to protect the environment.

Today, America's oil and gas industry operates under the most stringent environmental regulations in the world.

We also have even more stringent regulations about their use.

The older member states have begun calling for more stringent European regulation.

Yet, of course, there can only be competition in this area if it is subject to extremely stringent and clear regulation.

We will check whether a more stringent regulation is needed here.

California's geography and its stringent environmental regulations have made the state's gas more expensive than in the rest of the nation.