A: The reason it matters storage rentals are governed by contract law rather than the RTA is there are certain terms outlined in the RTA governing all leases whether or not they are stipulated in the lease. In a storage contract, all points must be addressed in the contract as there is no all-encompassing governing Act.
The handling of abandoned goods and the restrictions on security deposits are two relevant examples. There are very strict rules for residential tenancies, but for storage agreements you may write your own rules in to your contract.