(1)  A police officer may enter (using reasonable force if necessary), remain on and search premises, including a conveyance –

(a) on or in which the police officer has reasonable grounds for believing that a person named in a warrant for arrest is present; or

(b) for the purpose of making an arrest without warrant if lawful to do so.

(2)  Before entering any premises pursuant to subsection (1) , a police officer must communicate or attempt to communicate to a person within the premises the police officer's authority to enter the premises unless the police officer reasonably believes that communicating or attempting to communicate would be likely to endanger any person or frustrate the arrest.