Appendix 8 of the NACHA Rules states that bEach Participating DFI, and any third-party service provider that provides ACH services to the Participating DFI, shall, in accordance with standard auditing procedures, conduct an internal or external audit of compliance with provisions of the ACH rules in accordance with the requirements of this Appendix.bB The NACHA rules audit should be completed no later than December 31 of each year.B JLA can assist you with documenting the ACH rules compliance audit.B