(1)    Within 20 days of completion of the hearing conducted under s. 68.11 and the filing of briefs, if any, the decision maker shall mail or deliver to the appellant its written determination stating the reasons therefor. Such determination shall be a final determination.

   (2)   A determination following a hearing substantially meeting the requirements of s. 68.11 or a decision on review under s. 68.09 following such hearing shall also be a final determination.