"They expect voluntary compliance," one person involved in the case said.

"However, we hope that voluntary compliance is the end result."

Hoping for voluntary compliance on I-95 is not going to solve a thing.

Analysts say there seems to be a good deal of voluntary compliance thus far.

"Our tax system is based on individual self assessment and voluntary compliance."

Once that's done, you ask for voluntary compliance from everyone else.

It has been shown in a voluntary compliance with basic political laws.

"I think you're walking a thin line between a system of voluntary compliance and police state tactics," she said.

That in turn will help the agency win voluntary compliance, he says.

For example, Massachusetts now pulls in some $200 million from new voluntary compliance every year.