§62-12-20. To whom article applies.
The provisions of this article shall be applied to all persons
who shall be convicted of a crime committed after this article
takes effect. All persons convicted of a crime committed before
this article takes effect, whether convicted before or after that
time, shall remain subject to the law in effect when the crime was
committed, but any such person who consents to be subject to this
article may avail himself of its provisions.