Whether you’re building a house, carrying out a renovation, or you just need a written agreement between you and your subcontractors. You don't have to use a QBCC contract. If you prefer, you can use one from an industry association, but you do need to make sure that it complies with Queensland legislation. For those wanting to use an interstate contract, unfortunately they don't usually comply with the QBCC legislation.
Alternatively, you can develop your own contract, but if you choose this option, you must get legal advice first.