I don't think there would be anything precluding for separate plans. I think however, the plan sponsor was told because they were a controlled group, they could operate the plan this way. I do believe they were told this by the business owner of the TPA firm where I used to work. I never worked on this plan but because of some reorganization done and realignment of the work, I was assigned this plan. I read and re-read the document, looking for something that would provide guidance. I documented what I thought was wrong; could not give my blessing on the cross-testing and turned it over to management. This client/sponsor reads everything closely and tries to do everything by the book. I recently quit this job; one reason due to reorganization and unfair realignment and in the back of mind, that this is a second-rate TPA firm. After I documented and discussed what I thought was wrong with this document, the owner of the TPA firm says, I think it is okay. Strange but true, firm had 6 employees, and two of us quit during February. Glad I'm out of there.