A community group fighting to prevent James Packer's six star casino being built on Sydney Harbour's foreshore alleges the planning body that signed off on it failed to fulfil its legal obligations.

Community group Millers Point Fund Inc is challenging a decision by the NSW Planning Assessment Commission to allow Mr Packer’s Crown to develop the casino on the waterfront at Barangaroo. The foreshore site was originally designated as a public park with the casino to be built further back, but in…