FAA Order 8130.2M — Operating Limitation 10
Appendix D · Table D-1 · p. p170
The pilot in command (PIC) must hold—(a)An appropriate type rating (if one has been established);(b)An experimental aircraft authorization, by make and model, on their pilot certificate; or(c)A temporary letter of authorization (LOA) issued by a Flight Standards operations inspector.(d)For FAA personnel acting in an official capacity, an authorization issued in accordance with the applicable FAA policy Information to obtain an experimental aircraft authorization or temporary LOA can be found in FAA Order 8900.1, volume 5, chapter 9, section 2. The PIC must meet § 61.57 recent flight experience.
Verify it yourself: the eyeball above opens the exact page of Order 8130.2M with this limitation highlighted.