(1) A landlord, or a tenant, must not enter into a retail lease that is not (a) in writing; and(b) signed by both parties to the retail lease.Penalty: In the case of (a) a body corporate, a fine not exceeding 100 penalty units; and(b) an individual, a fine not exceeding 50 penalty units.(2) A landlord, or a tenant, must not amend a retail lease unless the amendment is (a) in writing; and(b) signed by both parties to the retail lease.Penalty: In the case of (a) a body corporate, a fine not exceeding 50 penalty units; and(b) an individual, a fine not exceeding 25 penalty units.(3) Nothing in this section means that a retail lease that fails to comply with this section is illegal, invalid or unenforceable.