Issue 1. Obviously not all of the provisions created by ERISA or the applicable sections of the IRC have to be in a plan document. Despite that, plan documents are still BIG documents that (1) regurgitate some of those provisions, (2) incorporate others by reference and (3) leave the remaining provisions out of the document completely. How do I (or anyone) know which of those provisions MUST be regurgitated in a plan document, which may be incorporated by reference and which MAY be included in a plan document, but are not required to be included?
I know there are different types of plan documents for purposes of the IRS D-letter program. If the type of plan (e.g., prototype, VS or individually designed) is relevant to the answer, how?
Issue 2. A qualified plan, once installed, may be amended from time to time at the election of the plan sponsor (a so-called discretionary amendment). There is no reason that I can see why a plan sponsor cannot amend its plan retroactively unless doing so is specifically prohibited by law (e.g., the law prohibits an amendment from taking away vested or accrued benefits). However, the IRS has said in recent guidance that discretionary amendments must be adopted no later than the last day of the plan year in which they become effective. Huh?
Thanks so much for your help!