For purposes of this article, a uniform parking violations ticket shall consist of five copies, one of which must be blue and placed upon the vehicle parked in violation of this article; one of which must be yellow and must be dispatched to the department for its records; one of which must be white and must be maintained by the originating agency; one of which must be green and must be retained by the trial officer for his records; and one of which must be pink and must be dispatched by the issuing agency to the department for purposes of audit, unless otherwise provided for by the department. Each ticket shall have a unique identifying number.