The department shall have the traffic tickets printed. Police agencies shall order tickets from the department and shall record the identifying numbers of the tickets received by them. The cost of the tickets shall be paid by the police agency. The audit copy and the department records copy shall be forwarded to the department within ten days of the disposition of the case by final trial court action or by nolle prosequi. The head of each police agency shall be responsible for the forwarding of the audit copies and for conducting an annual inventory on December thirty-first of all tickets received but not yet disposed of by final trial court action or by nolle prosequi and for forwarding the results of the inventory on a form prescribed by the department to the department within ten days of the completion of the inventory."