Q4. Do the new critical mineral and battery componentsrequirements apply? (added December 29, 2022)
A4. Not yet. The critical mineral and battery component requirements under § 30D(e) will apply for vehicles placed in service after proposed guidance on these requirements is issued. The publication of these FAQs is not the issuance of proposed guidance with respect to the critical mineral and battery component requirements under § 30D(e) and does not trigger the applicability of those requirements. The Treasury Department and the IRS will explicitly identify when they have issued proposed guidance with respect to the critical mineral and battery component requirements under § 30D(e). However, vehicles ordered or purchased prior to but placed in service after Treasury and the IRS issue this proposed guidance will be subject to the critical mineral and battery component requirements. This proposed guidance is expected to be issued in March 2023.
Source: IRS FAQs FS-2023-04, February 2023 :
https://www.irs.gov/pub/taxpros/fs-2023-04.pdf still lists the "March 2023" date, but this is the latest IRS reference I could find.