If someone is going to joint venture one of these properties why do you think it will cost KAT Ex anything? Why would Kat hand over anything for somone to get a piece of their pie?
It works the other way around, if XYZ company wants to joint venture they pay for the privilage, by promising to pay for exploration in exchange for a percentage of the property.
The remaining unused authorized can be used for new property acquisitions, that works for me.