FAA Order 8130.34D — OPA / OPA-UAS Operating Limitation B-7
Appendix B · p. B-2
All software changes and major modifications, as defined by , performed under this certificate, public aircraft certificate of waiver or authorization (COA), or other authorizations that could potentially affect the safe operation of the OPA must be documented and provided to the geographic Flight Standards District Office (FSDO) before operating under this certificate. All software changes and major modifications must be flight tested in accordance with a flight test plan before conducting crew training, market surveys, sales demonstrations, customer crew training, and exhibition flights. The successful completion of the flight tests must be recorded in the aircraft records. All requested information must be provided to the geographic FSDO prior to any flights after major modifications or software changes.
Verify it yourself: the eyeball above opens the exact page of Order 8130.34D with this limitation highlighted.