What "rule change"? So far as I am aware, no one has said the AD is going to be repealed. So far as I understand it, there may be an AMOC involving an inspection regime that, by definition, has to be approved by CASA.
It has yet to be seen whether compliance with the alternative inspection regime will be any less expensive than wholesale replacement of cables at 15 years. Given that the AD itself was an unjustified overreaction, I'm not holding my breath for a sensible alternative inspection regime to be approved.