The NDIS calls these primary supports. Your primary supports live with you and are the main supports for you at home.ILO arrangements also involve supplementary supports, which are extra supports put in place with your primary support. These supports are flexible and you can use them to help get extra or different support from time to time. You can also use them if you need support outside the usual times your primary support is available. This might be when your primary support has other commitments such as work, medical appointments, or holidays. Supplementary supports can help to sustain your primary support and provide back-up support if needed.