basis it is 'unreasonable' ... A regulation prohibiting employment of all teachers with red hair would be an example. Ultimately, this issue is a question of statutory interpretation. Does the empowering provision authorise the making of the instrument? If it is extreme in its effect or plainly unreasonable, then it will not be within the ambit of the provision. The power to make delegated legislation must only be exercised by the person or body on whom it is conferred. The issue concerns whether the delegated legislative power has been unlawfully subdelegated to another person. the primary legislation provided that the Governor-General by Order in Council may fix prices at which milk may be bought or sold: the Governor-General made an order which provided that "the Minister [of Agriculture] may, after consultation with the Board, from time to time by notice to the parties concerned fix the town milk producer price". The Court of Appeal held that --  the order did not do what the statute authorised it to do, but instead purported to empower the Minister to perform the authorised act. It subdelegated the legislative power; and the empowering provision contained no express or implied power of delegation; and the rule against delegation does not prevent the making of regulations that confer on another person or body the authority to make decisions and exercise discretionary powers within the limits prescribed by the regulations, but the legislative power itself cannot be delegated; and an empowering provision should make it clear beyond