Pretty sure that "May" statement is just to cover their legal butts because not everyone qualifies getting the current credit. Its usually a weird circumstance but probably has to be said.
(l) TRANSITION RULE.—Solely for purposes of the application of section 30D of the Internal Revenue Code of 25 1986, in the case of a taxpayer that— 394 † HR 5376 EAS 1 (1) after December 31, 2021, and before the date of enactment of this Act, purchased, or entered into a written binding contract to purchase, a new qualified plug-in electric drive motor vehicle (as defined in section 30D(d)(1) of the Internal Revenue Code of 1986, as in effect on the day before the date of enactment of this Act), and (2) placed such vehicle in service on or after the date of enactment of this Act, such taxpayer may elect (at such time, and in such form and manner, as the Secretary of the Treasury, or the Secretary’s delegate, may prescribe) to treat such vehicle as having been placed in service on the day before the date of enactment of this Act.
pg 394
placed in service after this bill but may elect to treat such vehicle as having been placed in service on day before the date of this bill. No hard deadlines are given so if you sign a written binding contract before the bill, you can take delivery 5 years from now and itll still qualify for the old tax credit is how im reading it. im assuming they will probably let these slide for the few hundred thousand reservations or so across the various manufactures that converted to orders.