Multiemployer signatures

[Guest Dell]

Under EFAST2, are there any complications for multiemployer plans where two trustees must each sign as administrator? In reviewing online followings I find some disparity. Some plans have one trustee signature appearing on the proper admin signature line, and the other on the plan sponsor line ( I think this was the most often used method on paper filings even though no one was technically signing as plan sponsor) . Some have one signature on the admin signature line and the other signature on the admin printed name line.

Or doesn't it really matter, as long as the two trustees have filing signer credentials it all works out?