Again, I'd have to go back and check, but I believe PDS is also where the expenses for the licensing and MMP defense come from.  Logically that makes sense to me as otherwise, PTSC would pay half, and TPL would pay half out of their own coffers, and that seems like an accounting mess.  If PDS pays it from the proceeds generated in licensing, then the MMP related accounting stays in a  tidy package which is what PDS was created for IMO.

Again, I'd have to go back and find that specifica language in the master agreement, but I'm pretty sure that's correct.  Others can comment/correct if they know.  I'l try to check later today.