Miss. Code Ann. § 47-7-43: Miss. Code Ann. § 47-7-43

The provisions of this chapter are hereby extended to all persons who, at the effective date thereof, may be on parole, or eligible to be placed on parole under existing laws, with the same force and effect as if this chapter had been in operation at the time such persons were placed on parole or become eligible to be placed thereon, as the case may be.