Mexico won a ruling from the world trade body in 1992 that the tariff violated Mexico's due process.
Earlier this month, a group of parents won a preliminary ruling allowing them to arrange testing for their children.
In the latest case, each side has won a ruling in its favor.
Last week, the parents won a ruling giving their daughter a place and striking down the racial preferences.
Eastern's pilots union won a ruling on its contract.
When she declined, they won a ruling by a federal district judge ordering Texas to negotiate the compact, and went into business.
The girls and their parents won a ruling that blocked the district attorney, who appealed.
Berlinger appealed the decision and won a more positive ruling in a later hearing.
The companies won a ruling that the Soviets were dumping production in this country below cost.
Last month, the groups won a ruling in a lower court to shut down the Sunday operation.