[edwin hubble]

The AP has not given essential information in this story.
(who what when where why)

What court (and what panel of that court) had struck down the law?

What court (or panel of that court) has now stayed that order?

This information is critical. (It was the Federal Circuit Court of Appeals for the District of Columbia, but we don't know if this was the same 3 Judge panel or the full court speaking).

[Sandy]

The Justice Department and the law's sponsors had asked the three-judge panel handling the case to stay its entire May 2 ruling

Same court, same 3 judges as before.