(a) Notwithstanding any other provision of law to the contrary, a person is ineligible for parole for a period of three years if he or she is sentenced to the custody of the Commissioner of Corrections and Rehabilitation, for service of a sentence of incarceration and is convicted of a felony violation under the provisions of 60A-4-401(a)(i) of this code for distribution of a controlled substance and:
(1) Is 21 years of age or older at the time of the distribution upon which the conviction is based, and the person to whom the controlled substance was distributed was under the age of 18 years at the time of the distribution;