Employer sponsors a 5304 SIMPLE, wants to change it to a 5305-SIMPLE. There are six employees who are participating in the SIMPLE plan and all want to move to the new investment platform as a group. (By moving as a group they will get a discount on fees, etc.) Does the employer have to wait until January 1, 2024 to make the change? And would he just restate on the 5305-SIMPLE?