Harlan F. Stone,
Yakus v. United States ex rel.Rottenberg…
“ It makes no distinction between regulations invalid on constitutional grounds and others merely departing in some respect from statutory limitations, which Congress might waive, or by the criterion whether invalidity appears on the face of the regulation or only by proof of facts. If the purpose and effect are to forbid the enforcing court to consider all questions of validity and thus to require it to enforce regulations which are or may be invalid for constitutional reasons, doubt arises in two respects. ”
