Historical AE&P.
(x) Historical AE&P. The term historical AE&P means the AE&P of the ETSC as of the beginning of the day on which the revocation of an election under section 1362(a) is effective pursuant to section 1362(d)(1). For purposes of the preceding sentence, if the ETSC's historical AE&P is less than zero, then the historical AE&P is treated as zero.