a. No person shall suffer any legal disqualification or disability because of his conviction of an offense or his sentence on such conviction, unless the disqualification or disability involves the deprivation of a right or privilege which is:
(1) Necessarily incident to execution of the sentence of the court;
(2) Provided by the Constitution or the code;
(3) Provided by a statute other than the code, when the conviction is of an offense defined by such statute; or
(4) Provided by the judgment, order or regulation of a court, agency or official exercising a jurisdiction conferred by law, or by the statute defining such jurisdiction, when the commission of the offense or the conviction or the sentence is reasonably related to the competency of the individual to exercise the right or privilege of which he is deprived.
b. Proof of a conviction as relevant evidence upon the trial or determination of any issue, or for the purpose of impeaching the convicted person as a witness is not a disqualification or disability within the meaning of this chapter.