There may be more current info from the IRS, but the last I looked at this, there was some controversy concerning a requirement to add auto enrollment to a Safe Harbor Non-ERISA plan (as opposed to a Non-Electing Church plan which is by law, not ERISA and, also, clearly exempt from the SECURE 2.0 Auto Enrollment procedures and rules) . The initial assumption was that there was no exception for a Safe Harbor Non-ERISA plan but those of us who work in this area pointed out that the auto enroll provisions could cause the sponsor to assert a level of control which could make the plan ERISA. A recent ASC broadcast reiterated this concern. There may be, further, some state law considerations: A Non-ERISA plan is subject to state law and there are states which still have auto enrollment prohibitions. Except for any Non-Electing Church plans which you may have, I would set aside these Safe Harbor Non-ERISA plans and keep looking for more clarity on this point as the Cycle 2 403(b) pre-approved documents come out and become available for use.