Notwithstanding any provisions of section one or three of this article to the contrary, the provisions of this article do not apply to facilities providing direct patient care services that are managed, directed, controlled and governed by the Secretary of the Department of Health and Human Resources: Provided, That on or before July 1, 2020, the Legislative Auditor shall audit the purchasing procedures of the facilities described in this section and report the results to the Joint Committee on Government and Finance on the effects of exempting said facilities from the provisions of this article, including, but not limited to, any realized cost savings and changes in purchasing policies resulting from such exemption.