Timing of Plan Amendments

[austin3515]

Let's say you just want to make a plain vanilla plan amendment to (let's say) add hardship distriubtions, or change the plan's eligibility?

When does such an amendment need to be signed? Or perhaps more to what I'm looking for, is there a good write-up somewhere that goes into when various amendments need to be signed? Before implented, by the last day of the plan year, etc., etc.

Has Corbel done this??