What the document says“Except as expressly provided otherwise, any reference to "this Act" contained in any division of this Act shall be treated as referring only to the provisions of that division.”
Section 3 is a reading rule. Each division of the Act carries its own appropriations and its own general provisions, several of which say none of the funds made available by this Act. Section 3 confines each such phrase to the division it appears in, unless the text says otherwise.
What the document actually says“Except as expressly provided otherwise, any reference to "this Act" contained in any division of this Act shall be treated as referring only to the provisions of that division.”
When one part of this law says this Act, it means just that part.
The law is built from eight big parts. Each part has its own rules about money. This keeps one part's rules from spilling into another.
No action is recorded against this proposal. That is not evidence that none has been taken, and nobody has yet read it against the record. See what the tracker does not yet cover.