Just to be clear, the application for a search warrant is made by an investigator, and we assist them with preparing the application.
The test is set out in whatever section under which the search warrant is being applied for. There are a number of sections contained within the Criminal Code that authorize different kinds of searches. The most commonly used section in the Criminal Code is section 487. Generally an investigator who is seeking a warrant under section 487 would have to demonstrate reasonable grounds for believing that an offence has been committed and that evidence of the offence is in the place to be searched.