But the court said nothing about whether the rules could be applied retroactively.

The standards will not be retroactively applied to the current teaching force.

These changes were later retroactively applied to the whole fleet.

This change will not, however, apply retroactively to people born before October 2011.

The Court did not decide whether today's decisions should be applied retroactively.

This should also apply retroactively to those found innocent of a crime.

Without a clear expression of Congress's intent, the law cannot be applied retroactively, he said.

But it was not immediately clear whether the ruling can be applied retroactively.

This method was also retroactively applied to the 2001 census data.

He added, however, that such a ruling should not be applied retroactively to cover the years before the policy is established.