Miss. Code § 47-5-603
Any offender on probation or released from a facility of the Department of Corrections on parole or earned probation who remains under the supervision of the Department of Corrections or any offender who is incarcerated in a state correctional facility may be required to participate in the Mississippi Department of Corrections drug identification program. Participation by an offender would consist of submission by the offender, from time to time and upon the request of a parole or probation supervisor, or authorized personnel of the department to any type of breath, saliva or urine chemical analysis test, the purpose of which is to detect the possible presence of alcohol or a substance prohibited or controlled by any law of the State of Mississippi or the United States.
Miss. Code § 47-5-603