"This is a precedent-setting case for us," one American official said.
Walsh was a prominent trial lawyer, claiming several victories in several "major precedent-setting cases".
If Vaughn does turn out to be a precedent-setting case, franchisors could find themselves in a no-win situation.
Such precedent-setting cases represent a relatively small amount of the legal work financed by the corporation.
Other center lawyers began to win precedent-setting cases that established new gains for powerless citizens.
In 2007, the Federal Government ruled on a precedent-setting case that has restricted activities around the tunnel, such as rock climbing.
In a precedent-setting case the court ruled in their favour, and they won again on appeal.
In 1964, Yablonski won a precedent-setting case involving benefits to survivors of a mine disaster.
She was counsel of record in several precedent-setting cases involving employment law, bad faith, insurance coverage and arbitration.
"It's really a very important, precedent-setting case," she told The Associated Press.