A person's failure to complete an examination as required by RCW 46.20.305 may result in the suspension or denial of the person's driving privilege. A person dissatisfied with the departmental action which follows an examination he or she has taken under RCW 46.20.305 may appeal the department's action by requesting a formal hearing as provided in RCW 46.20.329. A request for a hearing under this section must be made in writing within fifteen calendar days from the date notice of the departmental action was given. If no request is made within the prescribed time the right to a hearing is waived.