The retention of acting or temporary rank always depends on whether an officer continues to hold a post for which the rank is appropriate, and this applies equally when he proceeds overseas.
Am I not right in saying that in the last war officers holding temporary rank retained it when they proceeded overseas? Would it not be fairer to allow them to retain their rank at least until they arrive at the other end?
I think the position is quite simple. An officer retains his temporary rank while he is doing the job for which he was given temporary rank. He will continue in his temporary rank if he is doing the same job when he goes overseas.