53-6-708. Waiver. The department may seek and obtain any necessary authorization provided under federal law to implement the program, including the waiver of any federal statutes or regulations. The department may not expand eligibility requirements unless authorized by the legislature. The department may seek a waiver of the federal requirement that the combined membership of medicare and medicaid enrollees in a managed health care entity may not exceed 75% of the managed health care entity's total enrollment. The department may not seek a waiver of the inpatient hospital reimbursement methodology in 42 U.S.C. 1396a(a)(13) even if the federal agency responsible for administering Title XIX determines that 42 U.S.C. 1396a(a)(13) applies to managed health care systems.