150. (1) Whoever drives or causes or allows or lets out a motor vehicle for use in any public place, the smoke of which would constitute a health hazard, shall be punishable with fine which may extend to ¹[two hundred] Taka. (2) Any police officer not below the rank of Sub Inspector of Police in uniform authorised in this behalf by the ²[Authority or any Inspector of Motor Vehicles or other persons authorised in this behalf by the Authority] may seize and detain such vehicle for such time as may be necessary to ascertain if the smokes constitute a health hazard. (3) No person shall be convicted of an offence punishable under sub-section (1) solely on the evidence of a witness unless that opinion is based on a test by the competent person.