"Not a 401k expert and the client asked the following: Calendar 401k plan with 3% NESH and PS provisions, it is combined with a cash balance plan. Plans are top heavy and top heavy is provided under the 401k plan. Eligibility is age 21/1 year and dual entry. Hiring a new employee on 10/1/2026 and sponsor wants to amend the 401k plan so that the employee can start deferring immediately. Not amending the CB plan, just the 401k provision. Does this employee also need to get SH i.e. ADP testing would be an issue if not? Possible top heavy issue too, at least in my opinion. Not providing PS allocation."