(c) All radio microwave, laser, and other electronic speed-measuring instruments shall be tested for accuracy within a 12-month period prior to the alleged violation by a technician possessing at least a General Radiotelephone Operator License from the Federal Communications Commissions or possessing a Certified Electronics Technician certificate issued by a Federal Communications Commission Commercial Operators License Examination Manager or by a laboratory established by the International Association of Chiefs of Police. A written certificate by the technician or laboratory showing that the test was made within the required period and that the instrument was accurate shall be competent and prima facie evidence of those facts in any proceeding referred to in subsection (a) of this section. All radio microwave, laser, and other speed enforcement instruments shall be tested in accordance with standards established by the North Carolina Criminal Justice Education and Training Standards Commission. The Commission shall provide for certification of all radio microwave, laser, and other speed enforcement instruments.