for the various automobile-related taxes, to comprehensively review the structure of the taxes and the structure of the tax rates, including the provisional tax rates (meaning the tax rates under special provisions based on the Act on Special Measures Concerning Taxation and the Supplementary Provisions of the Local Tax Act (Act No. 226 of 1950)), while simplifying them and taking into account the severe fiscal situation, their impact on the environment, and other factors, and to consider reducing the burden;