The nondiscrimination rules of
403(B) plans, except as regards salary reduction contributions, are identical to those for qualified plans. See Code section
403(B)(12)(A)(i), which specifically cross-references the Code sections covering nondiscrimination by qualified plans.
Of course, if you have a state or local governmental plan, it may be exempt from at least most of the nondiscrimination rules, regardless of whether it is a
401(a) or
403(B) plan.
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