Upon issuance of a determination by the Mayor imposing a Class I or Class II disciplinary action, the Mayor shall cause a copy of the Accusation and the determination to be filed with the Commission's secretary. Upon filing of a timely demand for investigation of the action, which demand shall be made within ten (10) days after being notified by the appointing authority of such discipline, the Commission's secretary shall cause copies of the Accusation, determination, and demand for investigation to be delivered to each Commission member.