For the purpose of carrying out a duty, the commissioner of human services shall have authority to accept uncompensated and voluntary services and to enter into contracts or agreements with private or public agencies, or persons, for uncompensated and voluntary services, as the commissioner may deem practicable. Uncompensated and voluntary services do not include services mandated by licensure and certification requirements for health care facilities. The volunteer agencies, organizations, or persons who provide services to residents of state facilities operated under the authority of the commissioner are not subject to the procurement requirements of chapters 16A and 16C. The agencies, organizations, or persons may purchase supplies, services, and equipment to be used in providing services to residents of state facilities through the Department of Administration.