Ocsalt Pty Ltd v Minister for Mineral Resources and Energy

Ocsalt Pty Ltd sought judicial review of a decision by the Minister for Mineral Resources and Energy, who refused to grant exemptions with retrospective effect from working conditions in respect of mining leases. The Minister had previously granted retrospective exemptions in 2004, but refused to do so in 2011. Ocsalt argued that the Minister misapprehended his statutory powers under s79 of the Act by failing to consider granting exemptions with retrospective effect and that the Minister's determination should be quashed. The primary issue before the court was whether s79 permits an exemption to be granted with retrospective operation. The court found that the language of s79 did not limit the Minister's discretion to grant an exemption for a period commencing before the date of the grant of the exemption. The court held that the Minister's power under s79 was not constrained in such a way that the period during which the exemption was to remain in force could only start from the date of the Minister's determination or a subsequent date. The court held that the Minister had not properly exercised the power available to him and that declaratory relief would ordinarily be sufficient. However, in this case, an order in the nature of mandamus may also be appropriate. The court made an order for the Minister to reconsider Ocsalt's application for exemptions with retrospective effect.