A Maori Warden may at any reasonable time enter any licensed premises in any area where he is authorised to carry out his duties and warn the licensee or any servant of the licensee to abstain from selling or supplying liquor to any Maori who in the opinion of the Warden is in a state of intoxication, or is violent, quarrelsome, or disorderly, or is likely to become so, whether intoxicated or not, and if the licensee or any servant of the licensee thereafter on the same day supplies liquor to that Maori, the licensee and, if the servant had been warned by the Warden, the servant, commits an offence against this Act.