Final answer:
Section 494(1) of the Criminal Code permits a citizen's arrest for an indictable offence, not for summary conviction or provincial offences.
Step-by-step explanation:
Section 494(1) of the Criminal Code allows anyone to make an arrest when they find a person committing an indictable offence. This is in line with the principles of the criminal justice system that aim to apprehend those suspected of serious crimes, which are typically tried in higher courts and may require more stringent procedures such as a presentment or indictment by a grand jury. It contrasts with summary conviction offences and provincial offences, which are generally considered less serious and may not necessitate such formal proceedings.