It should apply to many RAF stations. As soon as a potential employer sussed that the interviewee was an RAF wife, and therefore only likely to be on scene for a couple of years, the chance of getting the job were the square root of zero.
As far as the "cutoff" date goes, my wife had accrued enough credits until she was informed her that her pensionable age had been delayed from 60 to 66; a really dirty trick which caught many others, too.