(1) The department shall have authority to adopt, amend, and rescind such administrative rules and definitions as it deems necessary to carry out the policies and purposes of this chapter and to resolve issues and develop procedures to implement, update, and improve the nursing facility medicaid payment system.
(2) Nothing in this chapter shall be construed to require the department to adopt or employ any calculations, steps, tests, methodologies, alternate methodologies, indexes, formulas, mathematical or statistical models, concepts, or procedures for medicaid rate setting or payment that are not expressly called for in this chapter.