(a) The department shall act only with the consent of the vulnerable adult, unless the department obtains court authorization to provide necessary services, as provided in section 346-231. Investigation and services provided under this part shall be immediately terminated if:
(1) The vulnerable adult has the capacity to consent and either does not consent or withdraws consent to the receipt of protective services;
(2) The department determines that protection is no longer needed under this part; or
(3) The court so orders.
(b) Upon the department's determination that protective services are no longer needed, the vulnerable adult shall be referred to the agency responsible for follow-up services. For the mentally ill or adults with developmental or intellectual disabilities, the state agency designated to provide services shall be the department of health.