prototypical

I have questions about updating our prototype 401(k) plan disability benefit claims procedures for the new rules that start 4/1. 1. Does the plan document for the prototype 401(k) plan need to be amended? 2. If it does need to be amended, is the deadline 4/1 or the end of the plan year? 3. Should the prototype document provider be preparing this amendment? 4. If we prepare our own amendment to our prototype 401(k) plan, will it still be a prototype plan? 5. Which of the new rules have to be spelled out in the SPD we give to participants and which ones don't?