154. Owner or occupier of land on which unlawful assembly is held

Whenever any unlawful assembly or riot takes place, the owner or occupier of the land upon which such unlawful assembly is held, or such riot is committed, and any such person having or claiming an interest in such land, shall be punished with fine not exceeding $4,000 if he or his agent or manager, knowing that such offence is being or has been committed, or having reason to believe it is likely to be committed, do not -

give the earliest notice thereof in his or their power to the principal officer at the nearest police station;

in the case of his or their having reason to believe that it was about to be committed, use all lawful means in his or their power to prevent it; and

in the event of its taking place. do not use all lawful means in his or their power to disperse or suppress the unlawful assembly or riot.