Rev. Proc. 2022-40 modifies Rev. Proc. 2016-37, 2016-29 IRB 136, which, in part, provides the circumstances under which a plan sponsor may submit a determination letter application to the Internal Revenue Service with respect to a qualified individually designed plan, to permit the submission of determination letter applications for section 403(b) individually designed plans. Among other things, this revenue procedure also modifies the circumstances under which a plan is considered to have been issued an initial plan determination and modifies the scope of review of qualified individually designed plans submitted under the determination letter program.