No person shall drive a motor vehicle on a public road while the concentration of alcohol in a person’s body is:
0,05 grams per 100ml of blood or more, and;
0,02 grams per 100ml of blood or more in a case of a professional driver.
No person shall –
drive a vehicle on a public road; or
occupy the drivers/riders seat of a motor vehicle of which the engine is running,
while under the influence of intoxicating liquor or a drug having a narcotic effect.