Rescinding 5 year amortization bases

[Nancylee]

I have a client who is rescinding their 5 year amortization base extension.  After rescinding, can you re-elect the 5 year amortization extension?  I can't find anything that says you can or you can't.  Thanks.

[Effen]

I am curious why you would want to rescind, if you thought you might want to re-elect at a later date?  

I may have a client in a similar situation.  Years ago we saw a potential credit balance problem coming, so they made the election.  Things have gone well, contributions are up, benefit levels were lowered when PPA past and now the original CB problem appears to have passed.  Since they are likely not to have a future CB problem, it might make sense to revoke the election, but I what would they gain by that?  

You can argue easier valuation process since I don't need to maintain two sets of amortization bases, but is there any other reason?