S412(i) DB plan going to Traditional DB plan

[flosfur]

Accruals under a 412(i) plans were frozen and premiums to the insurance contract discontinued from 2003.

Since the conditions of IRC 412(i) A(2) and (4) are breached by the discontinuance of prems, the plan loses its 412(i) status and hence the minimum funding rules apply - correct?

If such is the case, for the first valuation (in this case for 2003), are there any restrictions on the usual actuarial parameters - valuation date, funding method and assumptions or does one treat this as a new plan (except for the accrued benefit service credits, accrued benefits and the available assets) for setting assumptions, method etc?