Rule of construction— Nothing in this section shall be construed, with respect to a waiver approved by the Secretary of Health and Human Services under section 1115 of the Social Security Act (
42 U.S.C. 1315), to allow for the continued application in perpetuity of such waiver with respect to any aspect of the implementation of the Medicaid program under title XIX of such Act in such State other than the authority of the State to implement a managed care delivery system in such State.