You may pass a school bus from the front or rear on an undivided roadway:

You may not pass a school bus on an undivided highway from either direction while the school bus is using its flashing red lights. If there are no flashing red lights, you may pass normally.

• Under no circumstances.
• When the red lamps on the school bus are flashing.
• When the red lamps on the school bus are not flashing.
• At anytime, if you drive slowly.