Mississippi Code Title 9. Courts § 9-3-61

As a part of the judicial power granted in Article 6, Section 144, of the Mississippi Constitution of 1890, the Supreme Court has the power to prescribe from time to time by general rules the forms of process, writs, pleadings, motions, rules of evidence and the practice and procedure for trials and appeals in the Court of Appeals and in the circuit, chancery and county courts of this state and for appeals to the Supreme Court from interlocutory or final orders of trial courts and administrative boards and agencies, and certiorari from the Court of Appeals.