Ann: Central Petroleum on the threshold of East Coast Gas Sales, page-25

I doubt it will matter where the gas is sourced from, be it Blacktip, Beetaloo or Mereenie, all available NT sourced gas is currently in high demand, and will be in greater demand when the planned Jemena expansion plans are completed.
Jemena is in negotiations to fill the remaining 20% currently available capacity with “conventional gas resource provider”, read that as CTP, and according to their press releases, Jemena was confident it could source enough gas to justify an expansion to the east coast.
IMO, CTP has sufficient time to get further gas supplies from our existing acreages to satisfy a large part of the future NGP available capacity, once the proposed expansion is completed.
Hang on to your hats people, the ride is about to become very exciting!