Answer:
Due to Environment Protection and Biodiversity Conservation Act 1999 and with the help of people that lives around the park.
Step-by-step explanation:
Environment Protection and Biodiversity Conservation Act 1999 is imposed on the park which helps in the sustainability of this park. This park is managed by the Aboriginal traditional owners and the Director of National Parks mutually which enhances its sustainability. The people that lives around the park also protect the biodiversity of the park and avoid everything that threatens the sustainability of that park.