Can I take the D license test with a C1 license without upgrading?

[DallasLee]

No, you cannot take the D license test with a C1 license without upgrading. Requirements for applying to add a medium-sized bus driving license: You must have held a driving license for city buses, large trucks, small cars, small automatic transmission cars, low-speed trucks, or three-wheeled cars for more than three years, and have no record of accumulating 12 penalty points in any of the last three scoring cycles before applying. Requirements for applying to add a tractor driving license: You must have held a medium-sized bus or large truck driving license for more than three years, or have held a large bus driving license for more than one year, and have no record of accumulating 12 penalty points in any of the last three scoring cycles before applying. Requirements for applying to add a large bus driving license: You must have held a medium-sized bus, city bus, or large truck driving license for more than five years, or have held a tractor driving license for more than two years, and have no record of accumulating 12 penalty points in any of the last five scoring cycles before applying.