(a) Except as provided in subdivision (b) of this section, a termination of probation and dismissal of an accusation or information pursuant to Section 1203.4 of the Penal Code shall not, for the purpose of this division, have any effect.
(b) Notwithstanding any other provision of this code, no person shall be denied a hearing solely on the basis that he has been convicted of a crime if he has obtained a certificate of rehabilitation under Section 4852.01 and following of the Penal Code, and if his probation has been terminated and the information or accusation has been dismissed pursuant to Section 1203.4 of the Penal Code.