I agree with Mark, there is no limit to the number of times the deferral can be applied to an individual non-dep, provided there are genuine periods of non-occupation between the deferral periods.
Coincidentally, I have another question on this subject…
At the site where I am working at the moment, the Northgate system is configured so you can apply the deferral to both elements of a joint HB/CTB claim, or to the individual elements. A colleague here says he has seen a situation where the deferral had to be applied to (say) HB, but not to the CTB. Unfortunately he can’t remember the details of that claim.
I cannot imagine any situation where this would be necessary – can anybody else?