I think it's still a grey area after all these years. My general
perception is that you can still be graded PES B, or "fit for most
operational vocations" (rather than "all operational vocations"
under PES A). From then on it's a mix-&-match of how to deploy
you, vis-a-vis whether you fit the specific requirements of a
certain vocation. & it seems to apply to all service
organzations, be it SAF or SCDF or Prisons, et al.
Whereever you end up, there'll still likely be constant &
ongoing adjustments from yourself as well as from your
colleagues/buddies, inc. complaints to your MO & him possibly
referring you on to specialist help.