FAA Order 8130.2M — Operating Limitation 2
Appendix D · Table D-1 · p. p167
This special airworthiness certificate is not in effect during public aircraft operations (PAO). The determination of public aircraft status is made on a flight-by-flight basis. The aircraft cannot be operated as a civil aircraft and as a public aircraft at the same time. PAO declarations are discussed in AC 00-1.1, as amended. Before operating this aircraft under this special airworthiness certificate following a PAO, the aircraft must be returned to the condition and configuration at the time of inspection for the issuance of this airworthiness certificate. The operator must have written procedures for returning the aircraft to the civil configuration. This action must be documented in the maintenance records.
Verify it yourself: the eyeball above opens the exact page of Order 8130.2M with this limitation highlighted.