Officers have immobilised your vehicle because your blood alcohol level is above the permitted limit. When can you drive again?

Officers have immobilised your vehicle because your blood alcohol level is above the permitted limit. When can you drive again?
A)I will not be able to drive that day; I have to find another driver.
B)When the officer leaves.
C)When the blood alcohol level drops to the permitted level.Correct
Officers may order the immediate immobilisation of the vehicle when the result of the tests and analyses, where applicable, is positive. This immobilisation shall be lifted as soon as the driver's blood alcohol level drops to the permitted level or when another driver can replace the driver who tested positive.