Takeover with Insurance

[JBones]

I am taking over a DB plan that provides a death benefit of the greater of policy proceeds less c.s.v plus Theoritical Reserve, or the PVAB and unfortunately I have very little experience with this method of providing life insurance in a plan. There will be 2 new entrants in the plan this year, and the plan will be purchasing policies for each of them.

What assumptions must be used to calculate the Theoritical Contribution for this purpose? Is it required to use the plan's AE, or can I use any "reasonable" assumptions? I would think that it would have to be consistent from participant to participant, so will I have to go back to the prior administrator and request their methodology?