(1) Whenever any peace officer engaged in the enforcement of the motor vehicle laws of this state uses an electronic, electrical, mechanical, or other device used to determine the speed of a motor vehicle on any highway, road, street, or other public way, such device shall be of a type approved by the department and shall have been tested to determine that it is operating accurately. Tests for this purpose shall be made not less than once each 6 months, according to procedures and at regular intervals of time prescribed by the department.
(2) Any police officer, upon receiving information relayed to him or her from a fellow officer stationed on the ground or in the air operating such a device that a driver of a vehicle has violated the speed laws of this state, may arrest the driver for violation of said laws where reasonable and proper identification of the vehicle and the speed of same has been communicated to the arresting officer.
(3)(a) A witness otherwise qualified to testify shall be competent to give testimony against an accused violator of the motor vehicle laws of this state when such testimony is derived from the use of such an electronic, electrical, mechanical, or other device used in the calculation of speed, upon showing that the speed calculating device which was used had been tested. However, the operator of any visual average speed computer device shall first be certified as a competent operator of such device by the department.
(b) Upon the production of a certificate, signed and witnessed, showing that such device was tested within the time period specified and that such device was working properly, a presumption is established to that effect unless the contrary shall be established by competent evidence.
(c) Any person accused pursuant to the provisions of this section shall be entitled to have the officer actually operating the device appear in court and testify upon oral or written motion.