Administrative law - Statutory order for review - Persons and bodies amenable - Duty to give reasons - "Tribunal" - Commissioner of Pay-roll Tax - Whether Commissioner bound to accord natural justice before making an assessment - Administrative Law Act 1978 (No 9234), s2, s8 - Pay-roll Tax Act (No. 8154), s18.

Administrative law - Natural justice - Duty to accord - Displacement of statutory scheme - Pay-roll Tax Act 1971 (No 8154), s18, s32, s33.

Administrative law - Statutory order for review - Persons and bodies amenable Workers Compensation Board - Whether "court of law" - Whether interim award is a "decision" - Administrative Law Act 1978 (No 9234), s2, s3.

Workers compensation - Weekly payments - Cessation by employer - "Actual return to work" - Voluntary activities - Worker's right to restoration of weekly payments - Workers Compensation Act 1958 (No 6419), s9, CL7(1)(a).