Likewise, states may bar all direct shipments if they so choose.

The ruling makes clear that states cannot bar corporate and union political expenditures in state elections.

But some states may bar specific industries, like utilities, from imposing them.

Some states have barred the use of these radar detectors.

In those cases, it has ruled that states and cities cannot bar the importing of waste from other areas.

A century ago, 14 states barred marriages between whites and Asians.

As of 1998, seven states absolutely barred felons from public employment.

The court agreed that the state could bar distribution of such stuff directly to children.

Among other indicators, during that period five states have barred the practice.

He said the state should bar new residents from entering the homes until they are all thoroughly inspected.