The Library of Congress adopts handles to provide persistent links to federal legislation. As FGI states, though,
Well, it is certainly nice to be able to link to legislation with a persistent link! But it would be much better if one could click to create a link rather than following a 600 word description of how to link on another page.
That’s in the nature of handles and other persistent link via redirect schemes. They are a step in the right direction, anyway. (hat tip to Slashdot)