Submit GUST approved plan for determination or wait til staggered remedial amendment period

[mariemonroe]

I have just restated a profit-sharing plan which received a favroable determination letter for GUST to add 401(k) provisions. Both are volume submitter documents. My question: should I submit the 401(k) plan for a favorable determination letter now or should I wait til it must be updated and submitted in the new proposed staggered remedial amendment period?