FAA Order 8130.2M — Operating Limitation 11
Appendix D · Table D-1 · p. p171
An authorized instructor, after providing ground and flight training, may make an endorsement to allow the airman to be pilot in command for completing a practical test for the issuance of an experimental aircraft authorization. The endorsement may allow solo operation of the aircraft. The endorsement may be valid for a period up to 30 days and must specify the flight conditions authorized (for example, day, night, IMC) and flying area. The flying area may not exceed 3/8 of the fuel range of the aircraft. (a) Information to obtain an experimental aircraft authorization or temporary LOA can be found in FAA Order 8900.1, volume 5, chapter 9, section 2.
Verify it yourself: the eyeball above opens the exact page of Order 8130.2M with this limitation highlighted.