Waives for contract periods through December 31, 1999, with respect to Catholic Health Services Plan of Brooklyn and Queens, Inc. (doing business as Fidelis Health Plan), Managed Healthcare Systems of New York, Inc., and Health Partners of Philadelphia, Inc., the requirement under the Social Security Act that Medicare and Medicaid beneficiaries under titles XVIII and XIX of that Act constitute less than 75 percent of the membership of a participating health maintenance organization.