In theory the liable parent pays for everything, by the way of CS, other than when there are special circumstances and a special need. In such a scenario the recipient of CS can apply for a reason 2 change of assessment.
Thanks for your reply. You would think that the Ex would appreciate all the dollars paid in PHI premiums and the fact that the out of pocket expenses would be minimal compared to those if the there was no PHI at all. Will be interesting to see the outcome.