This also interests me greatly being AFPS 75 too. From what I have pieced together from the recent pensions aide memoire on the intranet it seems unlikely that IP will be honoured. I'm basing this on the fact that the 10 years to go, no change proposal only refers to the 'normal' retirement age of 55. No mention is made of IP or to being within ten years of it. I think we are likely too just retain our earned pension, ie your pension will be based on your current rank at changeover, not your longest held rank as under the new career average scheme. Sorry if this is somewhat rambling.