Delayed Cash-Balance Regs

[JAY21]

I just read the ASPPA ASAP notice on the delayed effective date of fina/proposed cash-balance regs. I think I understand it but what about optional use of such regs before the new effective date, is that still allowed ?

I believe previously that even though 2012 was the effective date we were allowed to optionally rely upon the proposed regs before then. Is that still an option ?

Thanks for any opinions.