Thanks for the link Brandon.
Aside from the non-retroactive wording, ("after the date of the enactment") it seems pretty clear that this bill won't help the majority of enthusiasts here.
As the $7k credit applies in full only for individual / joint AGI levels of $30k / $60k, then reduces by $250 per $1000 above that, the credit will be zero for AGI levels of $58k / $88k. I suspect that renders it basically useless for the majority of Tesla customers here who seem to have plenty of income from jobs or investments.
Another interesting point is the credit applies to a batch of 600,000 cars manufactured, then halves and then disappears beyond that. Apparently these sales would be counted regardless of whether or how many of those customers actually qualified for the tax credit. I think this means that very very little of the allotted credit would ever be paid out - only to those Tesla customers who have low AGI but somehow still managed to buy a Tesla.
I these conditions remain, then I think Tesla should lobby to defer the start of the program until the future Model 2(?), the more affordable car is launched. Otherwise the count will be exceeded (within 2021 most likely) with no benefit to many real purchasers, and no real benefit to Tesla either.