You will need this registration if you intend to operate a disability service. A disability service provides for the support of those who are disabled in some capacity. Disability includes both intellectual and physical disabilities.
While registration is not compulsory, a service provider that holds a service agreement with the Department will usually be required to apply for registration as a condition of funding.
Please consult the responsible agency for more information and to ascertain the level of compliance (if any) that may be required.