What law requires Mississippi Supreme Court to write or approve local and uniform rules for Miss. courts?

M.R.C.P. 83(c)"All local and uniform rules hereinafter approved by the Supreme Court shall be submitted for publication in the Southern Reporter." Where is the mandate to write the rules that get approved by the Supreme Court? The rules also for evidence, criminal, appellate procedure. Is there a single mandate to write rules, or are there several mandates for these areas? Where can that requirement(s) be found? Thankyou.