If a permittee has violated this chapter or the terms of any permit two times within a 6-month period, the Unit may suspend for 30 days the permittee from use of all Heavy Weight Port Corridor permits issued and outstanding. If a permittee has violated this chapter or the terms of any permit three times within a 12-month period, the Unit may suspend for 60 days the permittee from use of all Heavy Weight Port Corridor permits issued and outstanding. If a permittee has violated this chapter or the terms of any permit more than three times within a 12-month period, the Unit may revoke permanently the permittee from use of any Heavy Weight Port Corridor permit. If the Unit determines that suspension or revocation is appropriate, it shall notify the permittee by certified mail and of the opportunity for appeal and to be heard. The permittee has 7 business days from receipt of the written notice of violation to file a written appeal with the Director, Office of Traffic and Safety, Maryland Department of Transportation State Highway Administration. An appeal will not be accepted unless it is in writing and filed within the prescribed time limit. If an appeal is filed, the Director shall review the entire record relating to the violation charged. If the appellant specifically requests a hearing, the Director shall grant a hearing. If the appellant fails to appear at the hearing, the Director may proceed with a review of the record. After reviewing the record and any evidence submitted at a hearing, the Director shall affirm, amend, or reverse the findings of the Unit. The decision of the Director is the final decision of the Maryland Department of Transportation State Highway Administration.