(a) An appeal may be taken from any order of the administrator resulting from a hearing held in accordance with Code Section 10-1-398 by any person adversely affected thereby to the Superior Court of Fulton County by serving on the administrator, within 20 days after the date of entry of such order, a written notice of appeal, signed by the appellant, stating:

(1) The order from which the appeal is taken; and

(2) The ground upon which a reversal or modification of the order is sought.

(b) The court shall not substitute its judgment for that of the administrator as to the weight of the evidence on questions of fact. The court may affirm the decision of the administrator or remand the case for further proceedings. The court may reverse or modify the decision if substantial rights of the appellant have been prejudiced because the administrative findings, inferences, conclusions, or decisions are:

(1) In violation of constitutional or statutory provisions;

(2) In excess of the statutory authority of the administrator;

(3) Made upon unlawful procedure;

(4) Affected by other error of law;

(5) Clearly erroneous in view of the reliable, probative, and substantial evidence on the whole record; or

(6) Arbitrary or capricious or characterized by abuse of discretion or clearly unwarranted exercise of discretion.