The Commissioner of Motor Vehicles in his discretion reserves the right to alter or change the requirements or specifications or to require additional or supplementary tests at any time. The commissioner further reserves the right to require the manufacturer to submit laboratory reports on verification tests on samples selected by the commissioner from manufacturer's or distributor's stock. If any such report discloses any unwarranted deviation in material, design, construction or performance, the commissioner may revoke the approval. Approval may be withdrawn at any time and for any cause deemed reasonable by the commissioner.