How to Use "retroactive" with Example Sentences

1. And the plan should be retroactive to mr. obama 's march 30 announcement .

2. And wto members should further improve the organization by making tribunal decisions retroactive .

3. The criminal law is not a retroactive law .

4. But the supreme court for more than 200 years has said that not all laws with retroactive effect are unconstitutional .

5. Experts say a pure retroactive extension might be constitutional , but they doubt one is feasible at this late date .