When does a removal or variation of condition create new PP liable for CIL - Public forum - Planning Advisory Service (PAS)

If you have an application for a removal or variation of condition it can sometimes create a whole new PP.

Where the original PP was granted prior to a CIL Charging Schedule being in place, an application to remove/vary a condition once a Charging Schedule has been adopted can therefore create CIL liability on the entire floor space (for example not just on any increase in floor area).

My question is, how do you determine whether a removal/variation of condition creates a whole new PP? And do you therefore determine that this creates CIL liability on the whole of the chargeable floor space of the development?

Thanks in advance for any help.