A police officer, the occupier, or an authorized person may arrest without warrant if they believe a person is on premises in contravention of which act?

The correct response is based on the specific provisions outlined in the Trespass to Property Act (TPA). The TPA allows a police officer, the occupier of a property, or someone authorized by the occupier to arrest without a warrant if they believe that a person is on the premises unlawfully or is contravening the provisions of the act. This authority is designed to protect the rights of property owners and maintain order on their property, emphasizing the importance of lawful entry and occupancy.

In contrast, the Criminal Code generally deals with more serious offenses and outlines procedures for arrest related to those crimes, which do not specifically address issues of entry onto private property. The Provincial Offences Act relates to lesser offenses and violations of regulations but does not specifically authorize immediate arrest for trespassing without a warrant as the TPA does. Meanwhile, the Canadian Charter of Rights does not provide grounds for warrantless arrests but rather sets out the protections of individual rights in the legal system, making it irrelevant to this specific scenario regarding trespass. Thus, the specific powers conferred by the TPA serve to underline why it is the correct answer in this context.