(1)  For the purposes of section 11 of the Act, the prescribed dose limit that applies to the occupational exposure of a person to radon-222 in the workplace is 20 millisieverts in any one year.

(2)  If a person who is in charge of a workplace suspects that, over the next 12 months, the average concentration of radon-222 will exceed 1 000 becquerels of radon per cubic metre of air in the workplace, the person must –

(a) increase ventilation in the workplace so that the average concentration of radon-222, over the next 12 months, does not exceed 1 000 becquerels of radon per cubic metre of air; or

(b) if such an increase of ventilation is not possible in the workplace, a person in charge of the workplace must –

(i) prepare a plan that contains the methods used to ensure that the total effective dose to any person in the workplace is not more than the prescribed dose limit specified in subregulation (1) ; and

(ii) submit the plan to the Director of Public Health for approval; and

(iii) implement the plan as approved by the Director of Public Health.

Penalty:  Fine not exceeding 500 penalty units.

(3)  A person who is in charge of a workplace must notify the Director of Public Health if the average concentration of radon-222, over a 12-month period, exceeds 1 000 becquerels of radon per cubic metre of air in the workplace.

Penalty:  Fine not exceeding 100 penalty units.