Miss. Code Ann. § 47-5-905: Miss. Code Ann. § 47-5-905

(1) All persons placed under the custody of the Department of Corrections shall be processed at a reception and diagnostic center of the Department of Corrections and then be assigned to an appropriate correctional facility for a complete and thorough classification, not to exceed ninety (90) days, unless the department determines that a person can be properly processed and classified at the county jail in accordance with the department's classification plan.

(2) The Department of Corrections shall develop a plan for the processing and classification of inmates in county jails and shall implement the plan by January 1, 1993.