I realise that departments all do things differently, but does your department recognise promotion:
a) if you go to another government department on promotion and return to your original department. Do you keep your promotion grade or return to your original grade when you go back?
b) If your job gets upgraded while you are in it, you are put on temporary promotion for 3-4 years, but when you move on, are you now regarded as being permanently in the higher grade or do you have to revert to your original lower grade?