Yeah, was wondering about that. If Calcutta has fallen and the UK reclaims a territory from Japan that was originally own by UK_Pacific, why shouldn’t the income revert to London? And vice versa.
If ANZAC reclaims the territory, Sydney can collect the income. I would argue that it would be consistent if the income reverted for a retaken territory. Perhaps there is a rule which specifically covers this situation?
EDIT: Oh, yes there is:
Capture of One of the United Kingdom’s Regional Capitals
If one of the regional capitals is captured by the Axis, it will surrender any unspent IPCs that its economy has in its treasury
to the capturing power. An economy whose capital is held by the Axis can’t collect income, spend IPCs, or repair units. The
free regional capital may never collect IPCs that would normally go to the captured regional capital, even if such territories
are recaptured from the Axis. Other Allied powers can temporarily take control of any original United Kingdom territory that
would otherwise be liberated when its regional capital (London or Calcutta) has been captured by the Axis.