The FAA has just released AC 43.209a titled Recommended Inspection Procedures for Former Military Aircraft. The AC states under 1) Purpose:
This advisory circular (AC) is for the development of inspection program requirements for the certification of former military aircraft in the experimental category for the purpose(s) of exhibition and air racing that operate in the United States in accordance with Title 14 of the Federal Code of Regulations (14 CFR) part 21, § 21.191(d) and (e). This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, for developing inspection program requirements for former military aircraft.
Although ACs are not regulatory they can set up an expected or acceptable level of compliance by Inspectors. Please add your comments on ex-military aircraft or ACs setting acceptable program requirements.
I have attached the complete AC.