Car rental terms and conditions rules promulgated... Effective from September 16th Presentation of rental car fee cost calculation standards... Discount rate limited to 60% Jeju Island is pushing for a plan to lower the standard rental car fee. Reporter Park Mira Jeju Island has decided to set an upper limit on the discount rate for rental car rentals and clearly define standards for vehicle repair costs. By reducing the excessive gap that occurs between the peak season and the off-season, we increase rationality and improve the relationship between consumers and business operators.