FAA Order 8130.2M — Operating Limitation 7
Appendix D · Table D-1 · p. p169
The pilot in command must hold a pilot certificate with the category and class rating or privilege appropriate to this aircraft and all authorizations and endorsements identified in Part 61 applicable to this aircraft. Student pilot operation: After completion of Phase I flight testing, holders of a student pilot certificate may operate this aircraft in solo flight without holding the aforementioned category or class rating only for the purpose of meeting aeronautical experience requirements of Part 61 pursuant to a sport, recreational, or private pilot certificate.
Verify it yourself: the eyeball above opens the exact page of Order 8130.2M with this limitation highlighted.