SEC. 11 . If any provision of this Act or the application of such provision to any circumstance shall be held invalid, the validity of the remainder of the Act and the applicability of such provision to other circumstances shall not be affected thereby.

Approved, March 11, 1941. (11)

This is a fairly standard kind of legal statement that protects a law from being dismantled by a successful legal challenge of a small part or single section. Basically, if something about the law is found unconstitutional, illegal, or superseded by another statute, that's the only part that is invalidated. The rest of it stands.

Then, of course, is the date of approval, which is when the President signed the bill, making it officially a law.