The type of license necessary depends on the vehicle, not the passengers.
If it is a standard van, a standard license is sufficient. If it is a large enough van to require a commercial license, a CDL is necessary.
You can only hold one CDL, so there's no need to pluralize it. Any bus designed to transport more than 15 persons (including the driver), you need a CDL with a passenger endorsement.
If it's designed to transport more than 15 persons (including the driver), then yes, you need a CDL of the class appropriate to the vehicle, as well as a passenger endorsement.
I am speaking for getting a CDL in the State of Ohio. The State of Ohio will let you take a written and driving CDL test without regard to the medication you are taking. So the answer is yes. What you also need to know though is that the Federal Government will not let you use that CDL to drive commercially if you can not pass their Department of Transportation Physical, which includes a check of medications that you are on.
Only if it's either a bus designed to transport more than 15 passengers (including the driver) or is carrying a sufficient quantity of hazardous material to require placards to be displayed.
If it's designed to transport more than 15 persons (including the driver), you will need at Class C (at least) CDL with passenger endorsement.
If it's being operated for-hire, you need a CDL with a passenger endorsement in any state. In any other instance, you need to get a letter of determination from the NCDOT. Any vehicle designed to transport more than 15 passengers (including the driver) requires a CDL with a passenger endorsement.
A good starting point for Commercial Driver License jobs in Ohio would be the Ohio Job Network page. Here one can refine the search for professional CDL jobs.
Yes. You'll need the CDL of a class appropriate to the vehicle being operated, a tanker endorsement, and a hazmat endorsement. 300 gallons puts you well past the 1000 lb. threshold for not needing one.
No... If you don't drive a vehicle requiring a CDL, you don't need a CDL. For a vehicle of 26,000 lbs. Gross Vehicle Weight Rating or less, the only times you'd need a CDL would be if it was hauling a quantity of hazardous materials which required visible placards, or if it was a bus designed to transport more than 15 persons (including the driver).
Air brakes have no determination as to whether a vehicle requires a CDL or not. If the vehicle isn't transporting hazardous materials, and it isn't a bus designed to transport more than 15 persons (including the driver), it does not require a CDL.
Yes, you will need insurance to drive with a CDL license.
Not necessarily. If the vehicle is under 26,000 lbs. GVWR, and is not used to transport hazardous materials or more than 15 persons (including the driver), a CDL isn't required.