MacBank
Macquarie Bank and MAp are two entities that I watch out of self interest.
The legislation says that the owners of Sydney Airport have first right of refusal for the construction of a second jet airport in the Sydney basin. From a certain date well this side of 100 years too. Much sooner. This means that if someone else came along with a plan to develop such an airport and the Feral gummint agrees in principle and forces the State government to cooperate which is two big asks then the owners either have to exercise their right to build the extra airport or let a competitor do it.
The loophole in the law is that there is no explicit prohibition of another turbo-prop airport anytime.