Which commercial driver is placed under the zero-alcohol standard by Section 20(b) of the Road User Rules 2017?

1. A full licence holder with an endorsement or permit to drive a public motor vehicle, taxicab, private hire car or licensed goods transport vehicle
2. Any driver of a motor truck over 2 tonnes unladen weight
3. Any driver being paid wages while driving, whatever the vehicle
4. Only the driver of a licensed omnibus carrying more than 25 passengers