So this suggests it's in the $220m-$335m range:
Still a very nice source of income, and likely recurring.
After reading your helpful comments, the Financial Times article, and Patrick McGee's tweets, I understand the current agreement is for the year 2019. The standard becomes tighter in 2021 and that's the year Jeffries expected FCA to owe over $2B Euros in fines for non-compliance. “Once you’ve set up a pool, it is valid for several years, ” according to Julia Poliscanova.
I'm assuming the "low triple digit million figure" that McGee mentioned in the tweet is for 2019. One would assume that Tesla would negotiate a payment in either Q1 or Q2 for 2019 in order to receive this money when it is most needed, but, of course, this is speculation.
So much of what Tesla needs to do is achieve a cumulative profit in 4 consecutive quarters by the end of Q2 so that we don't lose that really excellent profit of Q3 18. Q2 would need to be a profitable quarter, as well. Between improvements in autopilot (including the new hardware) and this payment, the likelihood of achieving S&P 500 qualifications by the end of Q2 19 has recently improved quite noticeably, IMO, provided the payment is contained mostly in Q1 or Q2.