That is, the law that they enact says "This law is to do blah blah blah.

Subsection 1373(a) of the US code is replaced with the following text 'blah blah blah'"

The wording used is pretty standard. So you can actually parse it in most cases to see what the actual changes are.

If nothing prevents you, you ought to throw this up for others to see. Worst comes to worst, no one finds it useful.