What does the law stipulate regarding the sale of tickets or giving change by a public vehicle driver?

1. AIt is permitted to sell tickets or give change - but only if the driver has an automatic ticket-vending device.
2. BIt is permitted to sell tickets or give change while the bus is moving.
3. CIt is permitted to give change to passengers while the vehicle is moving.
4. DIt is forbidden to sell tickets or give change while the bus or taxi is moving.

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