[legalbeagle]

This isn't correct. All federal courts except for the US Supreme Court are created by statute. The FISC judges are Article III judges on the district courts or courts of appeal, appointed for life. It is true they are assigned to the FISC for limited terms, but they are still article III judges serving in an article III court.

[pseingatl]

The U.S. Sentencing Commission consists of Article III judges but although it is a judicial agency it is not an Article III court. The presence of Article III judges does not an Article III court make.