A certificate of registration and license issued under the provisions of this chapter may be revoked only after a hearing of the charges by the board. The holder of the certificate must be notified in writing by the board of the charges against the holder and of the time and place fixed for the hearing. Such notice must be served by registered or certified mail, addressed to the post-office address of the certificate holder as shown in the holder’s certificate of registration and license. The time set for the hearing must be not less than ten days after the service of the notice. The hearing must be public and full opportunity must be given the accused to produce witnesses and evidence in the accused’s own behalf and to examine the witnesses against the accused. After hearing all the evidence, the board shall render its decision in writing and the accused must be furnished, by mail, a copy thereof. If the accused is found guilty of any offense for which revocation of the license is provided, the certificate of registration and license is revoked automatically.