We can argue about what they intended, but here is what they wrote: "The term “new source” means any stationary source, the construction or modification of wh

We can argue about what they intended, but here is what they wrote: "The term “new source” means any stationary source, the construction or modification of which is commenced after the publication of regulations (or, if earlier, proposed regulations) prescribing a standard of performance under this section which will be applicable to such source." and "The term “existing source” means any stationary source other than a new source." Finally.. congress didn't hand EPA an unlimited authority to make decisions about sources. It handed them a process they must follow when it comes to ruling on "new sources." With a law this complex, I'm not sure you can bring the intentions of a single sponsor into the consideration: https://www.law.cornell.edu/uscode/text/42/7411 https://www.law.cornell.edu/uscode/text/42/7411