What were the respective roles of law, justice, and morality in the decisions in Waltons Stores v Maher?

case to look at - Waltons Stores (Interstate) Ltd v Maher [1988] HCA 7; (1988) 164 CLR 387 (19 February 1988)

- Junsprudence by Meyerson may help

Positivism - direction or an order, must be by a sovereign (parliament or a monarch), sanction

Separability thesis - there is no necessary connection between and law and justice or morality

Natural law only enforceable only to the extent it reflects justice/morality

e.g Does justice brennans case reflect positivism or natural law, explain how