On 2/3/2023, the IRS issued Notice 2023-16 guidance that modifies the definitions of certain vehicle classifications for the new, previously owned and qualified commercial clean vehicle tax credits. As a result of this notice, the IRS updated the related frequently asked questions for these credits which can be found on IRS Fact Sheet 2023-4 here:

IRS Fact Sheet 2023-04

(This is Blog Post #1340)